11857923 has 48 divisors (see below), whose sum is σ = 21745152. Its totient is φ = 6048000.

The previous prime is 11857913. The next prime is 11857931. The reversal of 11857923 is 32975811.

It is not a de Polignac number, because 11857923 - 2⁴ = 11857907 is a prime.

It is a super-2 number, since 2×11857923² = 281220675747858, which contains 22 as substring.

Its product of digits (15120) is a multiple of the sum of its prime factors (336).

It is not an unprimeable number, because it can be changed into a prime (11857913) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49083 + ... + 49323.

It is an arithmetic number, because the mean of its divisors is an integer number (453024).

Almost surely, 2^11857923 is an apocalyptic number.

11857923 is a deficient number, since it is larger than the sum of its proper divisors (9887229).

11857923 is a wasteful number, since it uses less digits than its factorization.

11857923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336 (or 333 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 11857923 is about 3443.5335049916. The cubic root of 11857923 is about 228.0357169345.

The spelling of 11857923 in words is "eleven million, eight hundred fifty-seven thousand, nine hundred twenty-three".