72774156 has 48 divisors (see below), whose sum is σ = 208995584. Its totient is φ = 19192896.

The previous prime is 72774131. The next prime is 72774167. The reversal of 72774156 is 65147727.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 15 ways as a sum of consecutive naturals, for example, 32230 + ... + 34413.

Almost surely, 2^72774156 is an apocalyptic number.

It is an amenable number.

72774156 is an abundant number, since it is smaller than the sum of its proper divisors (136221428).

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

72774156 is a wasteful number, since it uses less digits than its factorization.

72774156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66670 (or 66668 counting only the distinct ones).

The product of its digits is 82320, while the sum is 39.

The square root of 72774156 is about 8530.7769868870. The cubic root of 72774156 is about 417.5024795770.

The spelling of 72774156 in words is "seventy-two million, seven hundred seventy-four thousand, one hundred fifty-six".