13245728 has 24 divisors (see below), whose sum is σ = 26635392. Its totient is φ = 6481216.

The previous prime is 13245709. The next prime is 13245731. The reversal of 13245728 is 82754231.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 13245694 and 13245703.

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, 2900 + ... + 5907.

It is an arithmetic number, because the mean of its divisors is an integer number (1109808).

Almost surely, 2^13245728 is an apocalyptic number.

It is an amenable number.

13245728 is an abundant number, since it is smaller than the sum of its proper divisors (13389664).

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

13245728 is an equidigital number, since it uses as much as digits as its factorization.

13245728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8864 (or 8856 counting only the distinct ones).

The product of its digits is 13440, while the sum is 32.

The square root of 13245728 is about 3639.4680930048. The cubic root of 13245728 is about 236.6057406704.

Adding to 13245728 its reverse (82754231), we get a palindrome (95999959).

The spelling of 13245728 in words is "thirteen million, two hundred forty-five thousand, seven hundred twenty-eight".