13979280 has 160 divisors (see below), whose sum is σ = 50782464. Its totient is φ = 3115008.

The previous prime is 13979279. The next prime is 13979291. The reversal of 13979280 is 8297931.

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 31 ways as a sum of consecutive naturals, for example, 88962 + ... + 89118.

Almost surely, 2^13979280 is an apocalyptic number.

13979280 is a gapful number since it is divisible by the number (10) 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 13979280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25391232).

13979280 is an abundant number, since it is smaller than the sum of its proper divisors (36803184).

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

13979280 is a wasteful number, since it uses less digits than its factorization.

13979280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233 (or 227 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 13979280 is about 3738.8875350831. The cubic root of 13979280 is about 240.8952673600.

The spelling of 13979280 in words is "thirteen million, nine hundred seventy-nine thousand, two hundred eighty".