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1230404031 = 32379673821
BaseRepresentation
bin100100101010110…
…0111100110111111
310011202020000000200
41021111213212333
510004440412111
6322031454543
742330155523
oct11125474677
93152200020
101230404031
1158159283a
122a4087453
13167bab32c
14b95a5d83
1573044256
hex495679bf

1230404031 has 24 divisors (see below), whose sum is σ = 1827649824. Its totient is φ = 797065920.

The previous prime is 1230404029. The next prime is 1230404041. The reversal of 1230404031 is 1304040321.

1230404031 is a `hidden beast` number, since 1 + 230 + 404 + 0 + 31 = 666.

It is not a de Polignac number, because 1230404031 - 21 = 1230404029 is a prime.

It is a super-2 number, since 2×12304040312 = 3027788159002097922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1230403995 and 1230404013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230404041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 320101 + ... + 323921.

It is an arithmetic number, because the mean of its divisors is an integer number (76152076).

Almost surely, 21230404031 is an apocalyptic number.

1230404031 is a deficient number, since it is larger than the sum of its proper divisors (597245793).

1230404031 is a wasteful number, since it uses less digits than its factorization.

1230404031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4831 (or 4828 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1230404031 is about 35077.1154885917. The cubic root of 1230404031 is about 1071.5585726981.

Adding to 1230404031 its reverse (1304040321), we get a palindrome (2534444352).

It can be divided in two parts, 1 and 230404031, that added together give a palindrome (230404032).

The spelling of 1230404031 in words is "one billion, two hundred thirty million, four hundred four thousand, thirty-one".

Divisors: 1 3 9 37 111 333 967 2901 3821 8703 11463 34389 35779 107337 141377 322011 424131 1272393 3694907 11084721 33254163 136711559 410134677 1230404031