13508864 has 18 divisors (see below), whose sum is σ = 26965470. Its totient is φ = 6754304.

The previous prime is 13508849. The next prime is 13508879. The reversal of 13508864 is 46880531.

It is an interprime number because it is at equal distance from previous prime (13508849) and next prime (13508879).

It can be written as a sum of positive squares in only one way, i.e., 10240000 + 3268864 = 3200^2 + 1808^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26129 + ... + 26640.

Almost surely, 2^13508864 is an apocalyptic number.

It is an amenable number.

13508864 is a deficient number, since it is larger than the sum of its proper divisors (13456606).

13508864 is an frugal number, since it uses more digits than its factorization.

13508864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52785 (or 52771 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 35.

The square root of 13508864 is about 3675.4406538536. The cubic root of 13508864 is about 238.1622601822.

The spelling of 13508864 in words is "thirteen million, five hundred eight thousand, eight hundred sixty-four".