Search a number
-
+
230720401 = 19139199439
BaseRepresentation
bin11011100000010…
…00001110010001
3121002010210220001
431300020032101
5433031023101
634521050001
75501043142
oct1560101621
9532123801
10230720401
1110926571a
1265326901
1338a52162
14228dbac9
15153c6901
hexdc08391

230720401 has 16 divisors (see below), whose sum is σ = 246400000. Its totient is φ = 215422416.

The previous prime is 230720387. The next prime is 230720423. The reversal of 230720401 is 104027032.

It is a cyclic number.

It is not a de Polignac number, because 230720401 - 29 = 230719889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230720101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525340 + ... + 525778.

It is an arithmetic number, because the mean of its divisors is an integer number (15400000).

Almost surely, 2230720401 is an apocalyptic number.

It is an amenable number.

230720401 is a deficient number, since it is larger than the sum of its proper divisors (15679599).

230720401 is a wasteful number, since it uses less digits than its factorization.

230720401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 230720401 is about 15189.4832367662. The cubic root of 230720401 is about 613.3315882577.

Adding to 230720401 its reverse (104027032), we get a palindrome (334747433).

The spelling of 230720401 in words is "two hundred thirty million, seven hundred twenty thousand, four hundred one".

Divisors: 1 19 139 199 439 2641 3781 8341 27661 61021 87361 525559 1159399 1659859 12143179 230720401