13870845 has 40 divisors (see below), whose sum is σ = 25743960. Its totient is φ = 7136640.

The previous prime is 13870837. The next prime is 13870849. The reversal of 13870845 is 54807831.

It can be written as a sum of positive squares in 4 ways, for example, as 4173849 + 9696996 = 2043^2 + 3114^2 .

It is not a de Polignac number, because 13870845 - 2³ = 13870837 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13870849) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11155 + ... + 12335.

It is an arithmetic number, because the mean of its divisors is an integer number (643599).

Almost surely, 2^13870845 is an apocalyptic number.

13870845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13870845 is a deficient number, since it is larger than the sum of its proper divisors (11873115).

13870845 is a wasteful number, since it uses less digits than its factorization.

13870845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1227 (or 1218 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 13870845 is about 3724.3583339953. The cubic root of 13870845 is about 240.2707881093.

The spelling of 13870845 in words is "thirteen million, eight hundred seventy thousand, eight hundred forty-five".