78744912 has 20 divisors (see below), whose sum is σ = 203424480. Its totient is φ = 26248288.

The previous prime is 78744877. The next prime is 78744923. The reversal of 78744912 is 21944787.

It is a happy number.

It is a super-2 number, since 2×78744912² = 12401522331775488, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 820212 + ... + 820307.

It is an arithmetic number, because the mean of its divisors is an integer number (10171224).

Almost surely, 2^78744912 is an apocalyptic number.

It is an amenable number.

78744912 is an abundant number, since it is smaller than the sum of its proper divisors (124679568).

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

78744912 is a wasteful number, since it uses less digits than its factorization.

78744912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640530 (or 1640524 counting only the distinct ones).

The product of its digits is 112896, while the sum is 42.

The square root of 78744912 is about 8873.8329936956. The cubic root of 78744912 is about 428.6217127031.

The spelling of 78744912 in words is "seventy-eight million, seven hundred forty-four thousand, nine hundred twelve".