78692772 has 12 divisors (see below), whose sum is σ = 183616496. Its totient is φ = 26230920.

The previous prime is 78692771. The next prime is 78692777. The reversal of 78692772 is 27729687.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (78692771) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3278854 + ... + 3278877.

Almost surely, 2^78692772 is an apocalyptic number.

It is an amenable number.

78692772 is an abundant number, since it is smaller than the sum of its proper divisors (104923724).

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

78692772 is a wasteful number, since it uses less digits than its factorization.

78692772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6557738 (or 6557736 counting only the distinct ones).

The product of its digits is 592704, while the sum is 48.

The square root of 78692772 is about 8870.8946561212. The cubic root of 78692772 is about 428.5270895717.

The spelling of 78692772 in words is "seventy-eight million, six hundred ninety-two thousand, seven hundred seventy-two".