78057764 has 12 divisors (see below), whose sum is σ = 139178844. Its totient is φ = 38292384.

The previous prime is 78057751. The next prime is 78057781. The reversal of 78057764 is 46775087.

It can be written as a sum of positive squares in 2 ways, for example, as 69889600 + 8168164 = 8360^2 + 2858^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183887 + ... + 184310.

It is an arithmetic number, because the mean of its divisors is an integer number (11598237).

Almost surely, 2^78057764 is an apocalyptic number.

It is an amenable number.

78057764 is a deficient number, since it is larger than the sum of its proper divisors (61121080).

78057764 is a wasteful number, since it uses less digits than its factorization.

78057764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368254 (or 368252 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 78057764 is about 8835.0305036259. The cubic root of 78057764 is about 427.3713147322.

The spelling of 78057764 in words is "seventy-eight million, fifty-seven thousand, seven hundred sixty-four".