13609908 has 54 divisors (see below), whose sum is σ = 37269414. Its totient is φ = 4185792.

The previous prime is 13609889. The next prime is 13609927. The reversal of 13609908 is 80990631.

It is an interprime number because it is at equal distance from previous prime (13609889) and next prime (13609927).

It can be written as a sum of positive squares in 3 ways, for example, as 345744 + 13264164 = 588^2 + 3642^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4966 + ... + 7202.

Almost surely, 2^13609908 is an apocalyptic number.

13609908 is a gapful number since it is divisible by the number (18) 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 13609908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18634707).

13609908 is an abundant number, since it is smaller than the sum of its proper divisors (23659506).

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

13609908 is a wasteful number, since it uses less digits than its factorization.

13609908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2273 (or 2255 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 13609908 is about 3689.1608802003. The cubic root of 13609908 is about 238.7545901551.

The spelling of 13609908 in words is "thirteen million, six hundred nine thousand, nine hundred eight".