78004556 has 24 divisors (see below), whose sum is σ = 161043456. Its totient is φ = 32351760.

The previous prime is 78004541. The next prime is 78004567. The reversal of 78004556 is 65540087.

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, 44066 + ... + 45801.

It is an arithmetic number, because the mean of its divisors is an integer number (6710144).

Almost surely, 2^78004556 is an apocalyptic number.

It is an amenable number.

78004556 is an abundant number, since it is smaller than the sum of its proper divisors (83038900).

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

78004556 is a wasteful number, since it uses less digits than its factorization.

78004556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89909 (or 89907 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 78004556 is about 8832.0187952699. The cubic root of 78004556 is about 427.2741869108.

The spelling of 78004556 in words is "seventy-eight million, four thousand, five hundred fifty-six".