13904784 has 50 divisors (see below), whose sum is σ = 40248230. Its totient is φ = 4634496.

The previous prime is 13904783. The next prime is 13904791. The reversal of 13904784 is 48740931.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12960000 + 944784 = 3600^2 + 972^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13904783) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4069 + ... + 6660.

Almost surely, 2^13904784 is an apocalyptic number.

It is an amenable number.

13904784 is an abundant number, since it is smaller than the sum of its proper divisors (26343446).

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

13904784 is a wasteful number, since it uses less digits than its factorization.

13904784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10749 (or 10734 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 13904784 is about 3728.9119056368. The cubic root of 13904784 is about 240.4665922939.

The spelling of 13904784 in words is "thirteen million, nine hundred four thousand, seven hundred eighty-four".