13620916 has 12 divisors (see below), whose sum is σ = 24105060. Its totient is φ = 6733760.

The previous prime is 13620889. The next prime is 13620931. The reversal of 13620916 is 61902631.

It can be written as a sum of positive squares in 2 ways, for example, as 8145316 + 5475600 = 2854^2 + 2340^2 .

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, 18775 + ... + 19486.

It is an arithmetic number, because the mean of its divisors is an integer number (2008755).

Almost surely, 2^13620916 is an apocalyptic number.

It is an amenable number.

13620916 is a deficient number, since it is larger than the sum of its proper divisors (10484144).

13620916 is a wasteful number, since it uses less digits than its factorization.

13620916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38354 (or 38352 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 13620916 is about 3690.6525168322. The cubic root of 13620916 is about 238.8189428375.

The spelling of 13620916 in words is "thirteen million, six hundred twenty thousand, nine hundred sixteen".