388643157 has 48 divisors (see below), whose sum is σ = 705067200. Its totient is φ = 210379680.

The previous prime is 388643149. The next prime is 388643161. The reversal of 388643157 is 751346883.

It is not a de Polignac number, because 388643157 - 2³ = 388643149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (388643257) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17407 + ... + 32867.

It is an arithmetic number, because the mean of its divisors is an integer number (14688900).

Almost surely, 2^388643157 is an apocalyptic number.

It is an amenable number.

388643157 is a deficient number, since it is larger than the sum of its proper divisors (316424043).

388643157 is a wasteful number, since it uses less digits than its factorization.

388643157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15503 (or 15490 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 388643157 is about 19714.0345185860. The cubic root of 388643157 is about 729.7660831816.

It can be divided in two parts, 388 and 643157, that added together give a triangular number (643545 = T₁₁₃₄).

The spelling of 388643157 in words is "three hundred eighty-eight million, six hundred forty-three thousand, one hundred fifty-seven".