13552640 has 44 divisors (see below), whose sum is σ = 32522736. Its totient is φ = 5419008.

The previous prime is 13552633. The next prime is 13552691. The reversal of 13552640 is 4625531.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

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, 3797 + ... + 6443.

Almost surely, 2^13552640 is an apocalyptic number.

13552640 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 13552640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16261368).

13552640 is an abundant number, since it is smaller than the sum of its proper divisors (18970096).

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

13552640 is an equidigital number, since it uses as much as digits as its factorization.

13552640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2672 (or 2654 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 13552640 is about 3681.3910414407. The cubic root of 13552640 is about 238.4192408235.

The spelling of 13552640 in words is "thirteen million, five hundred fifty-two thousand, six hundred forty".