78865652 has 12 divisors (see below), whose sum is σ = 146133540. Its totient is φ = 37113216.

The previous prime is 78865627. The next prime is 78865663. The reversal of 78865652 is 25656887.

It can be written as a sum of positive squares in 2 ways, for example, as 21196816 + 57668836 = 4604^2 + 7594^2 .

It is a junction number, because it is equal to n+sod(n) for n = 78865597 and 78865606.

It is a congruent number.

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, 579827 + ... + 579962.

It is an arithmetic number, because the mean of its divisors is an integer number (12177795).

Almost surely, 2^78865652 is an apocalyptic number.

It is an amenable number.

78865652 is a deficient number, since it is larger than the sum of its proper divisors (67267888).

78865652 is a wasteful number, since it uses less digits than its factorization.

78865652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1159810 (or 1159808 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 78865652 is about 8880.6335359590. The cubic root of 78865652 is about 428.8406701627.

The spelling of 78865652 in words is "seventy-eight million, eight hundred sixty-five thousand, six hundred fifty-two".