857948259 has 16 divisors (see below), whose sum is σ = 1332018432. Its totient is φ = 481005408.

The previous prime is 857948239. The next prime is 857948263. The reversal of 857948259 is 952849758.

It is a happy number.

It is not a de Polignac number, because 857948259 - 2¹¹ = 857946211 is a prime.

It is a super-2 number, since 2×857948259² = 1472150430242262162, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 857948199 and 857948208.

It is not an unprimeable number, because it can be changed into a prime (857948239) 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, 384309 + ... + 386534.

It is an arithmetic number, because the mean of its divisors is an integer number (83251152).

Almost surely, 2^857948259 is an apocalyptic number.

857948259 is a deficient number, since it is larger than the sum of its proper divisors (474070173).

857948259 is a wasteful number, since it uses less digits than its factorization.

857948259 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770906.

The product of its digits is 7257600, while the sum is 57.

The square root of 857948259 is about 29290.7538141305. The cubic root of 857948259 is about 950.2116828377.

The spelling of 857948259 in words is "eight hundred fifty-seven million, nine hundred forty-eight thousand, two hundred fifty-nine".