11857680 has 120 divisors (see below), whose sum is σ = 40854528. Its totient is φ = 3080448.

The previous prime is 11857667. The next prime is 11857693. The reversal of 11857680 is 8675811.

11857680 is a `hidden beast` number, since 1 + 1 + 8 + 576 + 80 = 666.

11857680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11857667) and next prime (11857693).

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30769 + ... + 31151.

Almost surely, 2^11857680 is an apocalyptic number.

11857680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11857680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20427264).

11857680 is an abundant number, since it is smaller than the sum of its proper divisors (28996848).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11857680 is a wasteful number, since it uses less digits than its factorization.

11857680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 436 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 36.

The square root of 11857680 is about 3443.4982212860. The cubic root of 11857680 is about 228.0341592402.

The spelling of 11857680 in words is "eleven million, eight hundred fifty-seven thousand, six hundred eighty".