13749328 has 20 divisors (see below), whose sum is σ = 28206900. Its totient is φ = 6470144.

The previous prime is 13749319. The next prime is 13749347. The reversal of 13749328 is 82394731.

It can be written as a sum of positive squares in 2 ways, for example, as 10679824 + 3069504 = 3268^2 + 1752^2 .

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, 25003 + ... + 25546.

It is an arithmetic number, because the mean of its divisors is an integer number (1410345).

Almost surely, 2^13749328 is an apocalyptic number.

It is an amenable number.

13749328 is an abundant number, since it is smaller than the sum of its proper divisors (14457572).

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

13749328 is a wasteful number, since it uses less digits than its factorization.

13749328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50574 (or 50568 counting only the distinct ones).

The product of its digits is 36288, while the sum is 37.

The square root of 13749328 is about 3708.0086299792. The cubic root of 13749328 is about 239.5670899603.

The spelling of 13749328 in words is "thirteen million, seven hundred forty-nine thousand, three hundred twenty-eight".