78472136 has 32 divisors (see below), whose sum is σ = 162570240. Its totient is φ = 35321088.

The previous prime is 78472087. The next prime is 78472151. The reversal of 78472136 is 63127487.

It is a super-2 number, since 2×78472136² = 12315752256804992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78472136.

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 7 ways as a sum of consecutive naturals, for example, 9416 + ... + 15671.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^78472136 is an apocalyptic number.

It is an amenable number.

78472136 is an abundant number, since it is smaller than the sum of its proper divisors (84098104).

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

78472136 is a wasteful number, since it uses less digits than its factorization.

78472136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25133 (or 25129 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 78472136 is about 8858.4499772816. The cubic root of 78472136 is about 428.1262183424.

The spelling of 78472136 in words is "seventy-eight million, four hundred seventy-two thousand, one hundred thirty-six".