78431008 has 24 divisors (see below), whose sum is σ = 154611072. Its totient is φ = 39164736.

The previous prime is 78430949. The next prime is 78431029. The reversal of 78431008 is 80013487.

It is a happy 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, 41541 + ... + 43387.

It is an arithmetic number, because the mean of its divisors is an integer number (6442128).

Almost surely, 2^78431008 is an apocalyptic number.

It is an amenable number.

78431008 is a deficient number, since it is larger than the sum of its proper divisors (76180064).

78431008 is a wasteful number, since it uses less digits than its factorization.

78431008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184 (or 3176 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 78431008 is about 8856.1282736871. The cubic root of 78431008 is about 428.0514102510.

The spelling of 78431008 in words is "seventy-eight million, four hundred thirty-one thousand, eight".