13620290 has 16 divisors (see below), whose sum is σ = 24661368. Its totient is φ = 5415936.

The previous prime is 13620287. The next prime is 13620317. The reversal of 13620290 is 9202631.

13620290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 10156969 + 3463321 = 3187^2 + 1861^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2207 + ... + 5666.

Almost surely, 2^13620290 is an apocalyptic number.

13620290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13620290 is a deficient number, since it is larger than the sum of its proper divisors (11041078).

13620290 is a wasteful number, since it uses less digits than its factorization.

13620290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8053.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 13620290 is about 3690.5677070066. The cubic root of 13620290 is about 238.8152841763.

The spelling of 13620290 in words is "thirteen million, six hundred twenty thousand, two hundred ninety".