12313840 has 80 divisors (see below), whose sum is σ = 35712000. Its totient is φ = 3836160.

The previous prime is 12313813. The next prime is 12313877. The reversal of 12313840 is 4831321.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5161 + ... + 7159.

It is an arithmetic number, because the mean of its divisors is an integer number (446400).

Almost surely, 2^12313840 is an apocalyptic number.

12313840 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 12313840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17856000).

12313840 is an abundant number, since it is smaller than the sum of its proper divisors (23398160).

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

12313840 is a wasteful number, since it uses less digits than its factorization.

12313840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2030 (or 2024 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 12313840 is about 3509.1081488036. The cubic root of 12313840 is about 230.9215702960.

The spelling of 12313840 in words is "twelve million, three hundred thirteen thousand, eight hundred forty".