78020456 has 32 divisors (see below), whose sum is σ = 148975200. Its totient is φ = 38301120.

The previous prime is 78020407. The next prime is 78020473. The reversal of 78020456 is 65402087.

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, 113891 + ... + 114573.

It is an arithmetic number, because the mean of its divisors is an integer number (4655475).

Almost surely, 2^78020456 is an apocalyptic number.

It is an amenable number.

78020456 is a deficient number, since it is larger than the sum of its proper divisors (70954744).

78020456 is a wasteful number, since it uses less digits than its factorization.

78020456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 78020456 is about 8832.9188833590. The cubic root of 78020456 is about 427.3032159760.

The spelling of 78020456 in words is "seventy-eight million, twenty thousand, four hundred fifty-six".