13620090 has 64 divisors (see below), whose sum is σ = 36028800. Its totient is φ = 3267840.

The previous prime is 13620073. The next prime is 13620119. The reversal of 13620090 is 9002631.

13620090 = 528² + 529² + ... + 572².

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 49032 + ... + 49308.

It is an arithmetic number, because the mean of its divisors is an integer number (562950).

Almost surely, 2^13620090 is an apocalyptic number.

13620090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 13620090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18014400).

13620090 is an abundant number, since it is smaller than the sum of its proper divisors (22408710).

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

13620090 is a wasteful number, since it uses less digits than its factorization.

13620090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 13620090 is about 3690.5406108049. The cubic root of 13620090 is about 238.8141152514.

The spelling of 13620090 in words is "thirteen million, six hundred twenty thousand, ninety".