388928165820 has 48 divisors (see below), whose sum is σ = 1089041805600. Its totient is φ = 103710087936.

The previous prime is 388928165807. The next prime is 388928165833. The reversal of 388928165820 is 28561829883.

It is an interprime number because it is at equal distance from previous prime (388928165807) and next prime (388928165833).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1599414 + ... + 1826466.

It is an arithmetic number, because the mean of its divisors is an integer number (22688370950).

Almost surely, 2^388928165820 is an apocalyptic number.

388928165820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

388928165820 is an abundant number, since it is smaller than the sum of its proper divisors (700113639780).

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

388928165820 is a wasteful number, since it uses less digits than its factorization.

388928165820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255614 (or 255612 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 60.

The spelling of 388928165820 in words is "three hundred eighty-eight billion, nine hundred twenty-eight million, one hundred sixty-five thousand, eight hundred twenty".