13285440 has 168 divisors, whose sum is σ = 52303680. Its totient is φ = 3032064.

The previous prime is 13285429. The next prime is 13285469. The reversal of 13285440 is 4458231.

It is a tau number, because it is divible by the number of its divisors (168).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19831 + ... + 20489.

Almost surely, 2^13285440 is an apocalyptic number.

13285440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13285440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26151840).

13285440 is an abundant number, since it is smaller than the sum of its proper divisors (39018240).

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

13285440 is a wasteful number, since it uses less digits than its factorization.

13285440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689 (or 676 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 13285440 is about 3644.9197522031. The cubic root of 13285440 is about 236.8419605457.

The spelling of 13285440 in words is "thirteen million, two hundred eighty-five thousand, four hundred forty".