807972156 has 18 divisors (see below), whose sum is σ = 2042374152. Its totient is φ = 269324040.

The previous prime is 807972133. The next prime is 807972173. The reversal of 807972156 is 651279708.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 11221800 + ... + 11221871.

Almost surely, 2^807972156 is an apocalyptic number.

It is an amenable number.

807972156 is an abundant number, since it is smaller than the sum of its proper divisors (1234401996).

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

807972156 is a wasteful number, since it uses less digits than its factorization.

807972156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22443681 (or 22443676 counting only the distinct ones).

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

The square root of 807972156 is about 28424.8510286334. The cubic root of 807972156 is about 931.3912026117.

The spelling of 807972156 in words is "eight hundred seven million, nine hundred seventy-two thousand, one hundred fifty-six".