13940784 has 120 divisors (see below), whose sum is σ = 45903312. Its totient is φ = 3893760.

The previous prime is 13940777. The next prime is 13940789. The reversal of 13940784 is 48704931.

It is a happy number.

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 (13940789) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20254 + ... + 20930.

Almost surely, 2^13940784 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13940784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22951656).

13940784 is an abundant number, since it is smaller than the sum of its proper divisors (31962528).

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

13940784 is a wasteful number, since it uses less digits than its factorization.

13940784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715 (or 706 counting only the distinct ones).

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

The square root of 13940784 is about 3733.7359306732. The cubic root of 13940784 is about 240.6739390874.

The spelling of 13940784 in words is "thirteen million, nine hundred forty thousand, seven hundred eighty-four".