78906020 has 12 divisors (see below), whose sum is σ = 165702684. Its totient is φ = 31562400.

The previous prime is 78906019. The next prime is 78906041. The reversal of 78906020 is 2060987.

It can be written as a sum of positive squares in 2 ways, for example, as 8076964 + 70829056 = 2842^2 + 8416^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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, 1972631 + ... + 1972670.

It is an arithmetic number, because the mean of its divisors is an integer number (13808557).

Almost surely, 2^78906020 is an apocalyptic number.

It is an amenable number.

78906020 is an abundant number, since it is smaller than the sum of its proper divisors (86796664).

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

78906020 is a wasteful number, since it uses less digits than its factorization.

78906020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3945310 (or 3945308 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 78906020 is about 8882.9060560157. The cubic root of 78906020 is about 428.9138261646.

The spelling of 78906020 in words is "seventy-eight million, nine hundred six thousand, twenty".