13404436 has 6 divisors (see below), whose sum is σ = 23457770. Its totient is φ = 6702216.

The previous prime is 13404427. The next prime is 13404451. The reversal of 13404436 is 63440431.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 13395600 + 8836 = 3660^2 + 94^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13404436.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1675551 + ... + 1675558.

Almost surely, 2^13404436 is an apocalyptic number.

It is an amenable number.

13404436 is a deficient number, since it is larger than the sum of its proper divisors (10053334).

13404436 is a wasteful number, since it uses less digits than its factorization.

13404436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3351113 (or 3351111 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 13404436 is about 3661.2069048334. The cubic root of 13404436 is about 237.5469809183.

Adding to 13404436 its reverse (63440431), we get a palindrome (76844867).

It can be divided in two parts, 1340 and 4436, that added together give a square (5776 = 76²).

The spelling of 13404436 in words is "thirteen million, four hundred four thousand, four hundred thirty-six".