13912780 has 24 divisors (see below), whose sum is σ = 33391008. Its totient is φ = 4770048.

The previous prime is 13912771. The next prime is 13912781. The reversal of 13912780 is 8721931.

It is not an unprimeable number, because it can be changed into a prime (13912781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49549 + ... + 49828.

It is an arithmetic number, because the mean of its divisors is an integer number (1391292).

Almost surely, 2^13912780 is an apocalyptic number.

13912780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13912780 is an abundant number, since it is smaller than the sum of its proper divisors (19478228).

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

13912780 is a wasteful number, since it uses less digits than its factorization.

13912780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99393 (or 99391 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 13912780 is about 3729.9839141744. The cubic root of 13912780 is about 240.5126772103.

The spelling of 13912780 in words is "thirteen million, nine hundred twelve thousand, seven hundred eighty".