78764544 has 60 divisors (see below), whose sum is σ = 227333106. Its totient is φ = 26253312.

The previous prime is 78764533. The next prime is 78764561. The reversal of 78764544 is 44546787.

It can be written as a sum of positive squares in only one way, i.e., 65804544 + 12960000 = 8112^2 + 3600^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 78764544.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3939 + ... + 13154.

Almost surely, 2^78764544 is an apocalyptic number.

It is an amenable number.

78764544 is an abundant number, since it is smaller than the sum of its proper divisors (148568562).

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

78764544 is a wasteful number, since it uses less digits than its factorization.

78764544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17117 (or 17098 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 78764544 is about 8874.9390983826. The cubic root of 78764544 is about 428.6573298287.

The spelling of 78764544 in words is "seventy-eight million, seven hundred sixty-four thousand, five hundred forty-four".