156400128 has 60 divisors (see below), whose sum is σ = 451394658. Its totient is φ = 52131840.

The previous prime is 156400121. The next prime is 156400129. The reversal of 156400128 is 821004651.

156400128 is a `hidden beast` number, since 1 + 5 + 640 + 0 + 12 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 133818624 + 22581504 = 11568^2 + 4752^2 .

It is a super-2 number, since 2×156400128² = 48922000076832768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (156400121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12363 + ... + 21578.

Almost surely, 2^156400128 is an apocalyptic number.

156400128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

156400128 is an abundant number, since it is smaller than the sum of its proper divisors (294994530).

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

156400128 is an equidigital number, since it uses as much as digits as its factorization.

156400128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33965 (or 33946 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 156400128 is about 12506.0036782339. The cubic root of 156400128 is about 538.7811191410.

Adding to 156400128 its reverse (821004651), we get a palindrome (977404779).

The spelling of 156400128 in words is "one hundred fifty-six million, four hundred thousand, one hundred twenty-eight".