78580072 has 8 divisors (see below), whose sum is σ = 147337650. Its totient is φ = 39290032.

The previous prime is 78580003. The next prime is 78580097. The reversal of 78580072 is 27008587.

It can be written as a sum of positive squares in only one way, i.e., 46158436 + 32421636 = 6794^2 + 5694^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) 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 as a sum of consecutive naturals, namely, 4911247 + ... + 4911262.

Almost surely, 2^78580072 is an apocalyptic number.

It is an amenable number.

78580072 is a deficient number, since it is larger than the sum of its proper divisors (68757578).

78580072 is a wasteful number, since it uses less digits than its factorization.

78580072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9822515 (or 9822511 counting only the distinct ones).

The product of its (nonzero) digits is 31360, while the sum is 37.

The square root of 78580072 is about 8864.5401459974. The cubic root of 78580072 is about 428.3224198780.

The spelling of 78580072 in words is "seventy-eight million, five hundred eighty thousand, seventy-two".