388205988 has 12 divisors (see below), whose sum is σ = 905814000. Its totient is φ = 129401992.

The previous prime is 388205981. The next prime is 388205989. The reversal of 388205988 is 889502883.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×388205988² = 301407778238112288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 388205988.

It is not an unprimeable number, because it can be changed into a prime (388205981) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16175238 + ... + 16175261.

It is an arithmetic number, because the mean of its divisors is an integer number (75484500).

Almost surely, 2^388205988 is an apocalyptic number.

It is an amenable number.

388205988 is an abundant number, since it is smaller than the sum of its proper divisors (517608012).

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

388205988 is a wasteful number, since it uses less digits than its factorization.

388205988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32350506 (or 32350504 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 51.

The square root of 388205988 is about 19702.9436379441. The cubic root of 388205988 is about 729.4923523828.

The spelling of 388205988 in words is "three hundred eighty-eight million, two hundred five thousand, nine hundred eighty-eight".