13436720 has 40 divisors (see below), whose sum is σ = 34082640. Its totient is φ = 4885760.

The previous prime is 13436711. The next prime is 13436741. The reversal of 13436720 is 2763431.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 13436720.

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, 6755 + ... + 8514.

It is an arithmetic number, because the mean of its divisors is an integer number (852066).

Almost surely, 2^13436720 is an apocalyptic number.

13436720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13436720 is an abundant number, since it is smaller than the sum of its proper divisors (20645920).

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

13436720 is a wasteful number, since it uses less digits than its factorization.

13436720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15293 (or 15287 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 13436720 is about 3665.6131819929. The cubic root of 13436720 is about 237.7375352036.

Subtracting from 13436720 its reverse (2763431), we obtain a square (10673289 = 3267²).

The spelling of 13436720 in words is "thirteen million, four hundred thirty-six thousand, seven hundred twenty".