857637434 has 8 divisors (see below), whose sum is σ = 1304079060. Its totient is φ = 422944416.

The previous prime is 857637433. The next prime is 857637449. The reversal of 857637434 is 434736758.

It can be written as a sum of positive squares in 2 ways, for example, as 814931209 + 42706225 = 28547^2 + 6535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (857637433) 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, 2936969 + ... + 2937260.

Almost surely, 2^857637434 is an apocalyptic number.

857637434 is a deficient number, since it is larger than the sum of its proper divisors (446441626).

857637434 is a wasteful number, since it uses less digits than its factorization.

857637434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5874304.

The product of its digits is 1693440, while the sum is 47.

The square root of 857637434 is about 29285.4474782271. The cubic root of 857637434 is about 950.0969186439.

The spelling of 857637434 in words is "eight hundred fifty-seven million, six hundred thirty-seven thousand, four hundred thirty-four".