13620580 has 24 divisors (see below), whose sum is σ = 28756728. Its totient is φ = 5419008.

The previous prime is 13620571. The next prime is 13620583. The reversal of 13620580 is 8502631.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1272384 + 12348196 = 1128^2 + 3514^2 .

It is not an unprimeable number, because it can be changed into a prime (13620583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2212 + ... + 5668.

It is an arithmetic number, because the mean of its divisors is an integer number (1198197).

Almost surely, 2^13620580 is an apocalyptic number.

13620580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13620580 is an abundant number, since it is smaller than the sum of its proper divisors (15136148).

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

13620580 is a wasteful number, since it uses less digits than its factorization.

13620580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663 (or 3661 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 13620580 is about 3690.6069961458. The cubic root of 13620580 is about 238.8169790972.

The spelling of 13620580 in words is "thirteen million, six hundred twenty thousand, five hundred eighty".