156985992 has 32 divisors (see below), whose sum is σ = 436072800. Its totient is φ = 52328592.

The previous prime is 156985981. The next prime is 156985993. The reversal of 156985992 is 299589651.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (156985993) 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 7 ways as a sum of consecutive naturals, for example, 363178 + ... + 363609.

It is an arithmetic number, because the mean of its divisors is an integer number (13627275).

Almost surely, 2^156985992 is an apocalyptic number.

156985992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

156985992 is an abundant number, since it is smaller than the sum of its proper divisors (279086808).

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

156985992 is a wasteful number, since it uses less digits than its factorization.

156985992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726802 (or 726792 counting only the distinct ones).

The product of its digits is 1749600, while the sum is 54.

The square root of 156985992 is about 12529.4050936188. The cubic root of 156985992 is about 539.4530263967.

The spelling of 156985992 in words is "one hundred fifty-six million, nine hundred eighty-five thousand, nine hundred ninety-two".