156877920 has 72 divisors (see below), whose sum is σ = 535350816. Its totient is φ = 41833728.

The previous prime is 156877913. The next prime is 156877939. The reversal of 156877920 is 29778651.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×156877920² = 49221363567052800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 53032 + ... + 55911.

It is an arithmetic number, because the mean of its divisors is an integer number (7435428).

Almost surely, 2^156877920 is an apocalyptic number.

156877920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156877920 is an abundant number, since it is smaller than the sum of its proper divisors (378472896).

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

156877920 is a wasteful number, since it uses less digits than its factorization.

156877920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108964 (or 108953 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 156877920 is about 12525.0916164314. The cubic root of 156877920 is about 539.3292082351.

The spelling of 156877920 in words is "one hundred fifty-six million, eight hundred seventy-seven thousand, nine hundred twenty".