78670976 has 16 divisors (see below), whose sum is σ = 156727590. Its totient is φ = 39335424.

The previous prime is 78670937. The next prime is 78670979. The reversal of 78670976 is 67907687.

It can be written as a sum of positive squares in only one way, i.e., 63616576 + 15054400 = 7976^2 + 3880^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is not an unprimeable number, because it can be changed into a prime (78670979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307181 + ... + 307436.

Almost surely, 2^78670976 is an apocalyptic number.

It is an amenable number.

78670976 is a deficient number, since it is larger than the sum of its proper divisors (78056614).

78670976 is an equidigital number, since it uses as much as digits as its factorization.

78670976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614631 (or 614619 counting only the distinct ones).

The product of its (nonzero) digits is 889056, while the sum is 50.

The square root of 78670976 is about 8869.6660591028. Note that the first 3 decimals coincide. The cubic root of 78670976 is about 428.4875220287.

The spelling of 78670976 in words is "seventy-eight million, six hundred seventy thousand, nine hundred seventy-six".