13398845 has 6 divisors (see below), whose sum is σ = 16088442. Its totient is φ = 10712528.

The previous prime is 13398817. The next prime is 13398859. The reversal of 13398845 is 54889331.

It can be written as a sum of positive squares in 3 ways, for example, as 1085764 + 12313081 = 1042^2 + 3509^2 .

It is not a de Polignac number, because 13398845 - 2¹⁴ = 13382461 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7367 + ... + 9003.

It is an arithmetic number, because the mean of its divisors is an integer number (2681407).

Almost surely, 2^13398845 is an apocalyptic number.

It is an amenable number.

13398845 is a deficient number, since it is larger than the sum of its proper divisors (2689597).

13398845 is an frugal number, since it uses more digits than its factorization.

13398845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279 (or 1642 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 13398845 is about 3660.4432791672. The cubic root of 13398845 is about 237.5139493192.

Multiplying 13398845 by its product of digits (103680), we get a square (1389192249600 = 1178640²).

The spelling of 13398845 in words is "thirteen million, three hundred ninety-eight thousand, eight hundred forty-five".