13691080 has 64 divisors (see below), whose sum is σ = 33611760. Its totient is φ = 4988928.

The previous prime is 13691033. The next prime is 13691107. The reversal of 13691080 is 8019631.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 15876 + 13675204 = 126^2 + 3698^2 .

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58644 + ... + 58876.

Almost surely, 2^13691080 is an apocalyptic number.

13691080 is a gapful number since it is divisible by the number (10) 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 13691080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16805880).

13691080 is an abundant number, since it is smaller than the sum of its proper divisors (19920680).

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

13691080 is a wasteful number, since it uses less digits than its factorization.

13691080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370 (or 366 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 13691080 is about 3700.1459430677. The cubic root of 13691080 is about 239.2283084135.

The spelling of 13691080 in words is "thirteen million, six hundred ninety-one thousand, eighty".