13613572 has 18 divisors (see below), whose sum is σ = 27713742. Its totient is φ = 5834304.

The previous prime is 13613569. The next prime is 13613581. The reversal of 13613572 is 27531631.

13613572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 9144576 + 4468996 = 3024^2 + 2114^2 .

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 13613572.

It is a congruent number.

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, 34533 + ... + 34924.

Almost surely, 2^13613572 is an apocalyptic number.

It is an amenable number.

13613572 is an abundant number, since it is smaller than the sum of its proper divisors (14100170).

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

13613572 is a wasteful number, since it uses less digits than its factorization.

13613572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69475 (or 69466 counting only the distinct ones).

The product of its digits is 3780, while the sum is 28.

The square root of 13613572 is about 3689.6574366735. The cubic root of 13613572 is about 238.7760137221.

The spelling of 13613572 in words is "thirteen million, six hundred thirteen thousand, five hundred seventy-two".