156231728 has 20 divisors (see below), whose sum is σ = 309739848. Its totient is φ = 76298880.

The previous prime is 156231727. The next prime is 156231767. The reversal of 156231728 is 827132651.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (156231721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112853 + ... + 114228.

Almost surely, 2^156231728 is an apocalyptic number.

It is an amenable number.

156231728 is a deficient number, since it is larger than the sum of its proper divisors (153508120).

156231728 is a wasteful number, since it uses less digits than its factorization.

156231728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227132 (or 227126 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 156231728 is about 12499.2690986313. The cubic root of 156231728 is about 538.5876765798.

The spelling of 156231728 in words is "one hundred fifty-six million, two hundred thirty-one thousand, seven hundred twenty-eight".