78772764 has 48 divisors (see below), whose sum is σ = 222421248. Its totient is φ = 21182208.

The previous prime is 78772763. The next prime is 78772783. The reversal of 78772764 is 46727787.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78772763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26154 + ... + 29009.

It is an arithmetic number, because the mean of its divisors is an integer number (4633776).

Almost surely, 2^78772764 is an apocalyptic number.

It is an amenable number.

78772764 is an abundant number, since it is smaller than the sum of its proper divisors (143648484).

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

78772764 is a wasteful number, since it uses less digits than its factorization.

78772764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55194 (or 55192 counting only the distinct ones).

The product of its digits is 921984, while the sum is 48.

The square root of 78772764 is about 8875.4021880701. The cubic root of 78772764 is about 428.6722411095.

The spelling of 78772764 in words is "seventy-eight million, seven hundred seventy-two thousand, seven hundred sixty-four".