13406404 has 24 divisors (see below), whose sum is σ = 27101088. Its totient is φ = 5735040.

The previous prime is 13406389. The next prime is 13406417. The reversal of 13406404 is 40460431.

It is a happy number.

It is a super-2 number, since 2×13406404² = 359463336422432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8214 + ... + 9709.

It is an arithmetic number, because the mean of its divisors is an integer number (1129212).

Almost surely, 2^13406404 is an apocalyptic number.

It is an amenable number.

13406404 is an abundant number, since it is smaller than the sum of its proper divisors (13694684).

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

13406404 is a wasteful number, since it uses less digits than its factorization.

13406404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17955 (or 17953 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 13406404 is about 3661.4756588021. The cubic root of 13406404 is about 237.5586056665.

Adding to 13406404 its reverse (40460431), we get a palindrome (53866835).

It can be divided in two parts, 1340 and 6404, that added together give a square (7744 = 88²).

The spelling of 13406404 in words is "thirteen million, four hundred six thousand, four hundred four".