388806020 has 12 divisors (see below), whose sum is σ = 816492684. Its totient is φ = 155522400.

The previous prime is 388805981. The next prime is 388806037. The reversal of 388806020 is 20608883.

It can be written as a sum of positive squares in 2 ways, for example, as 200732224 + 188073796 = 14168^2 + 13714^2 .

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, 9720131 + ... + 9720170.

It is an arithmetic number, because the mean of its divisors is an integer number (68041057).

Almost surely, 2^388806020 is an apocalyptic number.

It is an amenable number.

388806020 is an abundant number, since it is smaller than the sum of its proper divisors (427686664).

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

388806020 is a wasteful number, since it uses less digits than its factorization.

388806020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19440310 (or 19440308 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 388806020 is about 19718.1647219005. The cubic root of 388806020 is about 729.8680064099.

The spelling of 388806020 in words is "three hundred eighty-eight million, eight hundred six thousand, twenty".