13420404 has 36 divisors (see below), whose sum is σ = 35182784. Its totient is φ = 4473144.

The previous prime is 13420397. The next prime is 13420453. The reversal of 13420404 is 40402431.

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

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5932 + ... + 7875.

Almost surely, 2^13420404 is an apocalyptic number.

It is an amenable number.

13420404 is an abundant number, since it is smaller than the sum of its proper divisors (21762380).

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

13420404 is a wasteful number, since it uses less digits than its factorization.

13420404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13826 (or 13812 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 13420404 is about 3663.3869574480. The cubic root of 13420404 is about 237.6412692318.

Adding to 13420404 its reverse (40402431), we get a palindrome (53822835).

It can be divided in two parts, 13420 and 404, that added together give a cube (13824 = 24³).

The spelling of 13420404 in words is "thirteen million, four hundred twenty thousand, four hundred four".