78802020 has 72 divisors (see below), whose sum is σ = 260769600. Its totient is φ = 19103040.

The previous prime is 78802013. The next prime is 78802027. The reversal of 78802020 is 2020887.

It is an interprime number because it is at equal distance from previous prime (78802013) and next prime (78802027).

It is not an unprimeable number, because it can be changed into a prime (78802027) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17920 + ... + 21879.

It is an arithmetic number, because the mean of its divisors is an integer number (3621800).

Almost surely, 2^78802020 is an apocalyptic number.

It is an amenable number.

78802020 is an abundant number, since it is smaller than the sum of its proper divisors (181967580).

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

78802020 is a wasteful number, since it uses less digits than its factorization.

78802020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39825 (or 39820 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 78802020 is about 8877.0501857317. The cubic root of 78802020 is about 428.7253037933.

The spelling of 78802020 in words is "seventy-eight million, eight hundred two thousand, twenty".