11731857 has 16 divisors (see below), whose sum is σ = 16320000. Its totient is φ = 7488000.

The previous prime is 11731847. The next prime is 11731883. The reversal of 11731857 is 75813711.

It is not a de Polignac number, because 11731857 - 2⁷ = 11731729 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11731847) 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, 8769 + ... + 10017.

It is an arithmetic number, because the mean of its divisors is an integer number (1020000).

Almost surely, 2^11731857 is an apocalyptic number.

It is an amenable number.

11731857 is a deficient number, since it is larger than the sum of its proper divisors (4588143).

11731857 is a wasteful number, since it uses less digits than its factorization.

11731857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1384.

The product of its digits is 5880, while the sum is 33.

The square root of 11731857 is about 3425.1798492926. The cubic root of 11731857 is about 227.2247252174.

The spelling of 11731857 in words is "eleven million, seven hundred thirty-one thousand, eight hundred fifty-seven".