13699872 has 36 divisors (see below), whose sum is σ = 38959830. Its totient is φ = 4566528.

The previous prime is 13699853. The next prime is 13699921. The reversal of 13699872 is 27899631.

It can be written as a sum of positive squares in only one way, i.e., 11861136 + 1838736 = 3444^2 + 1356^2 .

It is a tau number, because it is divible by the number of its divisors (36).

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, 23497 + ... + 24072.

Almost surely, 2^13699872 is an apocalyptic number.

13699872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13699872 is an abundant number, since it is smaller than the sum of its proper divisors (25259958).

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

13699872 is a wasteful number, since it uses less digits than its factorization.

13699872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47585 (or 47574 counting only the distinct ones).

The product of its digits is 163296, while the sum is 45.

The square root of 13699872 is about 3701.3338136407. Note that the first 3 decimals coincide. The cubic root of 13699872 is about 239.2795058653.

The spelling of 13699872 in words is "thirteen million, six hundred ninety-nine thousand, eight hundred seventy-two".