13940509280 has 24 divisors (see below), whose sum is σ = 32934453552. Its totient is φ = 5576203648.

The previous prime is 13940509229. The next prime is 13940509291. The reversal of 13940509280 is 8290504931.

It is a super-2 number, since 2×13940509280² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43563932 + ... + 43564251.

It is an arithmetic number, because the mean of its divisors is an integer number (1372268898).

Almost surely, 2^13940509280 is an apocalyptic number.

13940509280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13940509280 is an abundant number, since it is smaller than the sum of its proper divisors (18993944272).

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

13940509280 is an equidigital number, since it uses as much as digits as its factorization.

13940509280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87128198 (or 87128190 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 13940509280 in words is "thirteen billion, nine hundred forty million, five hundred nine thousand, two hundred eighty".