13611690 has 24 divisors (see below), whose sum is σ = 35390628. Its totient is φ = 3629760.

The previous prime is 13611673. The next prime is 13611691. The reversal of 13611690 is 9611631.

It can be written as a sum of positive squares in 2 ways, for example, as 12552849 + 1058841 = 3543^2 + 1029^2 .

It is a super-2 number, since 2×13611690² = 370556209312200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13611691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 75531 + ... + 75710.

Almost surely, 2^13611690 is an apocalyptic number.

13611690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13611690 is an abundant number, since it is smaller than the sum of its proper divisors (21778938).

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

13611690 is a wasteful number, since it uses less digits than its factorization.

13611690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151254 (or 151251 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 13611690 is about 3689.4023906318. The cubic root of 13611690 is about 238.7650100666.

The spelling of 13611690 in words is "thirteen million, six hundred eleven thousand, six hundred ninety".