13940720 has 20 divisors (see below), whose sum is σ = 32412360. Its totient is φ = 5576256.

The previous prime is 13940701. The next prime is 13940747. The reversal of 13940720 is 2704931.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 13940720.

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, 87050 + ... + 87209.

It is an arithmetic number, because the mean of its divisors is an integer number (1620618).

Almost surely, 2^13940720 is an apocalyptic number.

13940720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13940720 is an abundant number, since it is smaller than the sum of its proper divisors (18471640).

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

13940720 is a wasteful number, since it uses less digits than its factorization.

13940720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174272 (or 174266 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 13940720 is about 3733.7273601590. The cubic root of 13940720 is about 240.6735707878.

The spelling of 13940720 in words is "thirteen million, nine hundred forty thousand, seven hundred twenty".