388189401 has 4 divisors (see below), whose sum is σ = 517585872. Its totient is φ = 258792932.

The previous prime is 388189393. The next prime is 388189427. The reversal of 388189401 is 104981883.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 388189401 - 2³ = 388189393 is a prime.

It is a super-2 number, since 2×388189401² = 301382022097477602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388189481) 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, 64698231 + ... + 64698236.

It is an arithmetic number, because the mean of its divisors is an integer number (129396468).

Almost surely, 2^388189401 is an apocalyptic number.

It is an amenable number.

388189401 is a deficient number, since it is larger than the sum of its proper divisors (129396471).

388189401 is a wasteful number, since it uses less digits than its factorization.

388189401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129396470.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 388189401 is about 19702.5227064962. The cubic root of 388189401 is about 729.4819624847.

The spelling of 388189401 in words is "three hundred eighty-eight million, one hundred eighty-nine thousand, four hundred one".