78672896 has 22 divisors (see below), whose sum is σ = 157271010. Its totient is φ = 39335936.

The previous prime is 78672883. The next prime is 78672943. The reversal of 78672896 is 69827687.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 78570496 + 102400 = 8864^2 + 320^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37391 + ... + 39438.

Almost surely, 2^78672896 is an apocalyptic number.

It is an amenable number.

78672896 is a deficient number, since it is larger than the sum of its proper divisors (78598114).

78672896 is an equidigital number, since it uses as much as digits as its factorization.

78672896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76849 (or 76831 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The square root of 78672896 is about 8869.7742925060. The cubic root of 78672896 is about 428.4910078096.

The spelling of 78672896 in words is "seventy-eight million, six hundred seventy-two thousand, eight hundred ninety-six".