13907728 has 10 divisors (see below), whose sum is σ = 26946254. Its totient is φ = 6953856.

The previous prime is 13907689. The next prime is 13907737. The reversal of 13907728 is 82770931.

It can be written as a sum of positive squares in only one way, i.e., 13046544 + 861184 = 3612^2 + 928^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434601 + ... + 434632.

Almost surely, 2^13907728 is an apocalyptic number.

It is an amenable number.

13907728 is a deficient number, since it is larger than the sum of its proper divisors (13038526).

13907728 is an equidigital number, since it uses as much as digits as its factorization.

13907728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869241 (or 869235 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 13907728 is about 3729.3066379690. The cubic root of 13907728 is about 240.4835620815.

The spelling of 13907728 in words is "thirteen million, nine hundred seven thousand, seven hundred twenty-eight".