13280904 has 96 divisors (see below), whose sum is σ = 44291520. Its totient is φ = 3500928.

The previous prime is 13280881. The next prime is 13280921. The reversal of 13280904 is 40908231.

It is a super-2 number, since 2×13280904² = 352764822114432, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5539 + ... + 7565.

It is an arithmetic number, because the mean of its divisors is an integer number (461370).

Almost surely, 2^13280904 is an apocalyptic number.

13280904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13280904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22145760).

13280904 is an abundant number, since it is smaller than the sum of its proper divisors (31010616).

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

13280904 is a wasteful number, since it uses less digits than its factorization.

13280904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059 (or 2052 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 13280904 is about 3644.2974631608. The cubic root of 13280904 is about 236.8150027778.

The spelling of 13280904 in words is "thirteen million, two hundred eighty thousand, nine hundred four".