13621740 has 48 divisors (see below), whose sum is σ = 41610240. Its totient is φ = 3302080.

The previous prime is 13621723. The next prime is 13621753. The reversal of 13621740 is 4712631.

It is a self number, because there is not a number n which added to its sum of digits gives 13621740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9660 + ... + 10979.

It is an arithmetic number, because the mean of its divisors is an integer number (866880).

Almost surely, 2^13621740 is an apocalyptic number.

13621740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13621740 is an abundant number, since it is smaller than the sum of its proper divisors (27988500).

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

13621740 is a wasteful number, since it uses less digits than its factorization.

13621740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20662 (or 20660 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 24.

The square root of 13621740 is about 3690.7641485199. The cubic root of 13621740 is about 238.8237585401.

The spelling of 13621740 in words is "thirteen million, six hundred twenty-one thousand, seven hundred forty".