857857434 has 32 divisors (see below), whose sum is σ = 2076160896. Its totient is φ = 230684160.

The previous prime is 857857411. The next prime is 857857447. The reversal of 857857434 is 434758758.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 600027 + ... + 601454.

It is an arithmetic number, because the mean of its divisors is an integer number (64880028).

Almost surely, 2^857857434 is an apocalyptic number.

857857434 is an abundant number, since it is smaller than the sum of its proper divisors (1218303462).

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

857857434 is a wasteful number, since it uses less digits than its factorization.

857857434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201510.

The product of its digits is 3763200, while the sum is 51.

The square root of 857857434 is about 29289.2033691598. The cubic root of 857857434 is about 950.1781508926.

The spelling of 857857434 in words is "eight hundred fifty-seven million, eight hundred fifty-seven thousand, four hundred thirty-four".