13280404 has 6 divisors (see below), whose sum is σ = 23240714. Its totient is φ = 6640200.

The previous prime is 13280401. The next prime is 13280413. The reversal of 13280404 is 40408231.

It can be written as a sum of positive squares in only one way, i.e., 10252804 + 3027600 = 3202^2 + 1740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13280401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1660047 + ... + 1660054.

Almost surely, 2^13280404 is an apocalyptic number.

It is an amenable number.

13280404 is a deficient number, since it is larger than the sum of its proper divisors (9960310).

13280404 is a wasteful number, since it uses less digits than its factorization.

13280404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3320105 (or 3320103 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 13280404 is about 3644.2288621874. The cubic root of 13280404 is about 236.8120308670.

Adding to 13280404 its reverse (40408231), we get a palindrome (53688635).

The spelling of 13280404 in words is "thirteen million, two hundred eighty thousand, four hundred four".