857987403 has 64 divisors (see below), whose sum is σ = 1483776000. Its totient is φ = 437754240.

The previous prime is 857987393. The next prime is 857987411. The reversal of 857987403 is 304789758.

It is not a de Polignac number, because 857987403 - 2²⁹ = 321116491 is a prime.

It is a super-2 number, since 2×857987403² = 1472284767413368818, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (857987453) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 413653 + ... + 415721.

It is an arithmetic number, because the mean of its divisors is an integer number (23184000).

Almost surely, 2^857987403 is an apocalyptic number.

857987403 is a deficient number, since it is larger than the sum of its proper divisors (625788597).

857987403 is a wasteful number, since it uses less digits than its factorization.

857987403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2137 (or 2123 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 51.

The square root of 857987403 is about 29291.4220037198. The cubic root of 857987403 is about 950.2261337948.

The spelling of 857987403 in words is "eight hundred fifty-seven million, nine hundred eighty-seven thousand, four hundred three".