388633401 has 12 divisors (see below), whose sum is σ = 604541028. Its totient is φ = 239158944.

The previous prime is 388633373. The next prime is 388633409. The reversal of 388633401 is 104336883.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 240281001 + 148352400 = 15501^2 + 12180^2 .

It is not a de Polignac number, because 388633401 - 2⁶ = 388633337 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (388633409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1660710 + ... + 1660943.

It is an arithmetic number, because the mean of its divisors is an integer number (50378419).

Almost surely, 2^388633401 is an apocalyptic number.

It is an amenable number.

388633401 is a deficient number, since it is larger than the sum of its proper divisors (215907627).

388633401 is a wasteful number, since it uses less digits than its factorization.

388633401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321672 (or 3321669 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 388633401 is about 19713.7870790977. The cubic root of 388633401 is about 729.7599767595.

The spelling of 388633401 in words is "three hundred eighty-eight million, six hundred thirty-three thousand, four hundred one".