72018456 has 32 divisors (see below), whose sum is σ = 185856000. Its totient is φ = 23231520.

The previous prime is 72018449. The next prime is 72018469. The reversal of 72018456 is 65481027.

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 7 ways as a sum of consecutive naturals, for example, 47656 + ... + 49143.

It is an arithmetic number, because the mean of its divisors is an integer number (5808000).

Almost surely, 2^72018456 is an apocalyptic number.

It is an amenable number.

72018456 is an abundant number, since it is smaller than the sum of its proper divisors (113837544).

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

72018456 is a wasteful number, since it uses less digits than its factorization.

72018456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96839 (or 96835 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 72018456 is about 8486.3688347844. The cubic root of 72018456 is about 416.0523078949.

The spelling of 72018456 in words is "seventy-two million, eighteen thousand, four hundred fifty-six".