388980820 has 24 divisors (see below), whose sum is σ = 817689600. Its totient is φ = 155434272.

The previous prime is 388980811. The next prime is 388980829. The reversal of 388980820 is 28089883.

It is an interprime number because it is at equal distance from previous prime (388980811) and next prime (388980829).

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388980829) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11421 + ... + 30139.

It is an arithmetic number, because the mean of its divisors is an integer number (34070400).

Almost surely, 2^388980820 is an apocalyptic number.

It is an amenable number.

388980820 is an abundant number, since it is smaller than the sum of its proper divisors (428708780).

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

388980820 is a wasteful number, since it uses less digits than its factorization.

388980820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19767 (or 19765 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 46.

The square root of 388980820 is about 19722.5966850210. The cubic root of 388980820 is about 729.9773684108.

The spelling of 388980820 in words is "three hundred eighty-eight million, nine hundred eighty thousand, eight hundred twenty".