13720290 has 32 divisors (see below), whose sum is σ = 33993216. Its totient is φ = 3540480.

The previous prime is 13720283. The next prime is 13720307. The reversal of 13720290 is 9202731.

13720290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 13720290.

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, 6447 + ... + 8306.

It is an arithmetic number, because the mean of its divisors is an integer number (1062288).

Almost surely, 2^13720290 is an apocalyptic number.

13720290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13720290 is an abundant number, since it is smaller than the sum of its proper divisors (20272926).

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

13720290 is a wasteful number, since it uses less digits than its factorization.

13720290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14794.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 13720290 is about 3704.0909816040. The cubic root of 13720290 is about 239.3983192338.

The spelling of 13720290 in words is "thirteen million, seven hundred twenty thousand, two hundred ninety".