13720404 has 48 divisors (see below), whose sum is σ = 33304320. Its totient is φ = 4392960.

The previous prime is 13720403. The next prime is 13720409. The reversal of 13720404 is 40402731.

13720404 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13720403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38692 + ... + 39044.

It is an arithmetic number, because the mean of its divisors is an integer number (693840).

Almost surely, 2^13720404 is an apocalyptic number.

It is an amenable number.

13720404 is an abundant number, since it is smaller than the sum of its proper divisors (19583916).

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

13720404 is a wasteful number, since it uses less digits than its factorization.

13720404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 480 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 13720404 is about 3704.1063699629. The cubic root of 13720404 is about 239.3989822745.

The spelling of 13720404 in words is "thirteen million, seven hundred twenty thousand, four hundred four".