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80712030 = 2357384343
BaseRepresentation
bin1001100111110…
…01000101011110
312121212121002110
410303321011132
5131130241110
612001534450
72000020020
oct463710536
9177777073
1080712030
1141618163
1223044426
131394c4c9
14aa10010
157144a20
hex4cf915e

80712030 has 32 divisors (see below), whose sum is σ = 221382144. Its totient is φ = 18448416.

The previous prime is 80712013. The next prime is 80712041. The reversal of 80712030 is 3021708.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 80711988 and 80712006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191962 + ... + 192381.

It is an arithmetic number, because the mean of its divisors is an integer number (6918192).

Almost surely, 280712030 is an apocalyptic number.

80712030 is an abundant number, since it is smaller than the sum of its proper divisors (140670114).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

80712030 is a wasteful number, since it uses less digits than its factorization.

80712030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384360.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 80712030 is about 8983.9874220749. The cubic root of 80712030 is about 432.1615158225.

Adding to 80712030 its reverse (3021708), we get a palindrome (83733738).

It can be divided in two parts, 8071 and 2030, that added together give a palindrome (10101).

The spelling of 80712030 in words is "eighty million, seven hundred twelve thousand, thirty".

Divisors: 1 2 3 5 6 7 10 14 15 21 30 35 42 70 105 210 384343 768686 1153029 1921715 2306058 2690401 3843430 5380802 5765145 8071203 11530290 13452005 16142406 26904010 40356015 80712030