870431157 has 16 divisors (see below), whose sum is σ = 1292343360. Its totient is φ = 579020400.

The previous prime is 870431153. The next prime is 870431183. The reversal of 870431157 is 751134078.

870431157 is a `hidden beast` number, since 8 + 70 + 431 + 157 = 666.

It is not a de Polignac number, because 870431157 - 2² = 870431153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (870431153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22519 + ... + 47412.

It is an arithmetic number, because the mean of its divisors is an integer number (80771460).

Almost surely, 2^870431157 is an apocalyptic number.

It is an amenable number.

870431157 is a deficient number, since it is larger than the sum of its proper divisors (421912203).

870431157 is a wasteful number, since it uses less digits than its factorization.

870431157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70401 (or 70395 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 870431157 is about 29503.0702978521. The cubic root of 870431157 is about 954.7979459782.

The spelling of 870431157 in words is "eight hundred seventy million, four hundred thirty-one thousand, one hundred fifty-seven".