13720972 has 48 divisors (see below), whose sum is σ = 27482112. Its totient is φ = 5955840.

The previous prime is 13720933. The next prime is 13721033. The reversal of 13720972 is 27902731.

13720972 is digitally balanced in base 2, because in such base 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 (31).

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, 48343 + ... + 48625.

It is an arithmetic number, because the mean of its divisors is an integer number (572544).

Almost surely, 2^13720972 is an apocalyptic number.

It is an amenable number.

13720972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

13720972 is a wasteful number, since it uses less digits than its factorization.

13720972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 356 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 31.

The square root of 13720972 is about 3704.1830408337. The cubic root of 13720972 is about 239.4022857911.

Subtracting from 13720972 its sum of digits (31), we obtain a triangular number (13720941 = T₅₂₃₈).

The spelling of 13720972 in words is "thirteen million, seven hundred twenty thousand, nine hundred seventy-two".