857244538 has 4 divisors (see below), whose sum is σ = 1285866810. Its totient is φ = 428622268.

The previous prime is 857244497. The next prime is 857244541. The reversal of 857244538 is 835442758.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 599417289 + 257827249 = 24483^2 + 16057^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214311133 + ... + 214311136.

Almost surely, 2^857244538 is an apocalyptic number.

857244538 is a deficient number, since it is larger than the sum of its proper divisors (428622272).

857244538 is a wasteful number, since it uses less digits than its factorization.

857244538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428622271.

The product of its digits is 1075200, while the sum is 46.

The square root of 857244538 is about 29278.7386681872. The cubic root of 857244538 is about 949.9518121449.

The spelling of 857244538 in words is "eight hundred fifty-seven million, two hundred forty-four thousand, five hundred thirty-eight".