13215408 has 20 divisors (see below), whose sum is σ = 34139928. Its totient is φ = 4405120.

The previous prime is 13215383. The next prime is 13215421. The reversal of 13215408 is 80451231.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137613 + ... + 137708.

Almost surely, 2^13215408 is an apocalyptic number.

It is an amenable number.

13215408 is an abundant number, since it is smaller than the sum of its proper divisors (20924520).

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

13215408 is a wasteful number, since it uses less digits than its factorization.

13215408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275332 (or 275326 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 13215408 is about 3635.3002627018. The cubic root of 13215408 is about 236.4250694180.

Adding to 13215408 its reverse (80451231), we get a palindrome (93666639).

The spelling of 13215408 in words is "thirteen million, two hundred fifteen thousand, four hundred eight".