11858640 has 40 divisors (see below), whose sum is σ = 36762528. Its totient is φ = 3162240.

The previous prime is 11858629. The next prime is 11858657. The reversal of 11858640 is 4685811.

11858640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24466 + ... + 24945.

Almost surely, 2^11858640 is an apocalyptic number.

11858640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11858640 is an abundant number, since it is smaller than the sum of its proper divisors (24903888).

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

11858640 is a wasteful number, since it uses less digits than its factorization.

11858640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49427 (or 49421 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 11858640 is about 3443.6376115962. The cubic root of 11858640 is about 228.0403129703.

The spelling of 11858640 in words is "eleven million, eight hundred fifty-eight thousand, six hundred forty".