13680620 has 24 divisors (see below), whose sum is σ = 28818384. Its totient is φ = 5455296.

The previous prime is 13680613. The next prime is 13680637. The reversal of 13680620 is 2608631.

It is a self number, because there is not a number n which added to its sum of digits gives 13680620.

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, 7079 + ... + 8801.

It is an arithmetic number, because the mean of its divisors is an integer number (1200766).

Almost surely, 2^13680620 is an apocalyptic number.

13680620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13680620 is an abundant number, since it is smaller than the sum of its proper divisors (15137764).

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

13680620 is a wasteful number, since it uses less digits than its factorization.

13680620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2129 (or 2127 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 13680620 is about 3698.7322152327. The cubic root of 13680620 is about 239.1673693292.

The spelling of 13680620 in words is "thirteen million, six hundred eighty thousand, six hundred twenty".