12900840 has 32 divisors (see below), whose sum is σ = 38702880. Its totient is φ = 3440192.

The previous prime is 12900821. The next prime is 12900851. The reversal of 12900840 is 4800921.

12900840 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12900840.

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, 53634 + ... + 53873.

It is an arithmetic number, because the mean of its divisors is an integer number (1209465).

Almost surely, 2^12900840 is an apocalyptic number.

12900840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12900840 is an abundant number, since it is smaller than the sum of its proper divisors (25802040).

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

12900840 is a wasteful number, since it uses less digits than its factorization.

12900840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107521 (or 107517 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 12900840 is about 3591.7739349798. The cubic root of 12900840 is about 234.5341003293.

The spelling of 12900840 in words is "twelve million, nine hundred thousand, eight hundred forty".