13621716 has 24 divisors (see below), whose sum is σ = 35315840. Its totient is φ = 4540536.

The previous prime is 13621697. The next prime is 13621723. The reversal of 13621716 is 61712631.

It is a super-2 number, since 2×13621716² = 371102293569312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 13621716.

It is a congruent number.

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, 62956 + ... + 63171.

Almost surely, 2^13621716 is an apocalyptic number.

It is an amenable number.

13621716 is an abundant number, since it is smaller than the sum of its proper divisors (21694124).

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

13621716 is a wasteful number, since it uses less digits than its factorization.

13621716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126140 (or 126132 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 13621716 is about 3690.7608971593. The cubic root of 13621716 is about 238.8236182796.

The spelling of 13621716 in words is "thirteen million, six hundred twenty-one thousand, seven hundred sixteen".