13528407 has 4 divisors (see below), whose sum is σ = 18037880. Its totient is φ = 9018936.

The previous prime is 13528387. The next prime is 13528477. The reversal of 13528407 is 70482531.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13528407 - 2¹⁰ = 13527383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13528477) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254732 + ... + 2254737.

It is an arithmetic number, because the mean of its divisors is an integer number (4509470).

Almost surely, 2^13528407 is an apocalyptic number.

13528407 is a deficient number, since it is larger than the sum of its proper divisors (4509473).

13528407 is an equidigital number, since it uses as much as digits as its factorization.

13528407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4509472.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 13528407 is about 3678.0982857993. The cubic root of 13528407 is about 238.2770530168.

The spelling of 13528407 in words is "thirteen million, five hundred twenty-eight thousand, four hundred seven".