13605980 has 12 divisors (see below), whose sum is σ = 28572600. Its totient is φ = 5442384.

The previous prime is 13605961. The next prime is 13606003. The reversal of 13605980 is 8950631.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340130 + ... + 340169.

It is an arithmetic number, because the mean of its divisors is an integer number (2381050).

Almost surely, 2^13605980 is an apocalyptic number.

13605980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13605980 is an abundant number, since it is smaller than the sum of its proper divisors (14966620).

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

13605980 is a wasteful number, since it uses less digits than its factorization.

13605980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680308 (or 680306 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 13605980 is about 3688.6284713969. The cubic root of 13605980 is about 238.7316186976.

The spelling of 13605980 in words is "thirteen million, six hundred five thousand, nine hundred eighty".