78009474 has 16 divisors (see below), whose sum is σ = 156124800. Its totient is φ = 25985520.

The previous prime is 78009467. The next prime is 78009487. The reversal of 78009474 is 47490087.

It is a Curzon 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, 7752 + ... + 14700.

It is an arithmetic number, because the mean of its divisors is an integer number (9757800).

Almost surely, 2^78009474 is an apocalyptic number.

78009474 is an abundant number, since it is smaller than the sum of its proper divisors (78115326).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78009474 is a wasteful number, since it uses less digits than its factorization.

78009474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8825.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 78009474 is about 8832.2972096731. The cubic root of 78009474 is about 427.2831662594.

The spelling of 78009474 in words is "seventy-eight million, nine thousand, four hundred seventy-four".