13428776 has 32 divisors (see below), whose sum is σ = 26830440. Its totient is φ = 6279168.

The previous prime is 13428773. The next prime is 13428809. The reversal of 13428776 is 67782431.

It can be written as a sum of positive squares in 4 ways, for example, as 13322500 + 106276 = 3650^2 + 326^2 .

It is not an unprimeable number, because it can be changed into a prime (13428773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39680 + ... + 40016.

Almost surely, 2^13428776 is an apocalyptic number.

It is an amenable number.

13428776 is a deficient number, since it is larger than the sum of its proper divisors (13401664).

13428776 is a wasteful number, since it uses less digits than its factorization.

13428776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 649 counting only the distinct ones).

The product of its digits is 56448, while the sum is 38.

The square root of 13428776 is about 3664.5294377314. The cubic root of 13428776 is about 237.6906745786.

The spelling of 13428776 in words is "thirteen million, four hundred twenty-eight thousand, seven hundred seventy-six".