78613072 has 40 divisors (see below), whose sum is σ = 156943080. Its totient is φ = 38123520.

The previous prime is 78613061. The next prime is 78613091. The reversal of 78613072 is 27031687.

It can be written as a sum of positive squares in 4 ways, for example, as 27290176 + 51322896 = 5224^2 + 7164^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 192004 + ... + 192412.

It is an arithmetic number, because the mean of its divisors is an integer number (3923577).

Almost surely, 2^78613072 is an apocalyptic number.

It is an amenable number.

78613072 is a deficient number, since it is larger than the sum of its proper divisors (78330008).

78613072 is a wasteful number, since it uses less digits than its factorization.

78613072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751 (or 745 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 78613072 is about 8866.4012992871. The cubic root of 78613072 is about 428.3823700296.

The spelling of 78613072 in words is "seventy-eight million, six hundred thirteen thousand, seventy-two".