78851020 has 12 divisors (see below), whose sum is σ = 165587184. Its totient is φ = 31540400.

The previous prime is 78850991. The next prime is 78851039. The reversal of 78851020 is 2015887.

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, 1971256 + ... + 1971295.

It is an arithmetic number, because the mean of its divisors is an integer number (13798932).

Almost surely, 2^78851020 is an apocalyptic number.

It is an amenable number.

78851020 is an abundant number, since it is smaller than the sum of its proper divisors (86736164).

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

78851020 is a wasteful number, since it uses less digits than its factorization.

78851020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942560 (or 3942558 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 31.

The square root of 78851020 is about 8879.8096826452. The cubic root of 78851020 is about 428.8141474852.

The spelling of 78851020 in words is "seventy-eight million, eight hundred fifty-one thousand, twenty".