13945280 has 28 divisors (see below), whose sum is σ = 33207960. Its totient is φ = 5577984.

The previous prime is 13945279. The next prime is 13945301. The reversal of 13945280 is 8254931.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21470 + ... + 22109.

Almost surely, 2^13945280 is an apocalyptic number.

13945280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13945280 is an abundant number, since it is smaller than the sum of its proper divisors (19262680).

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

13945280 is an equidigital number, since it uses as much as digits as its factorization.

13945280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43596 (or 43586 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 13945280 is about 3734.3379600674. The cubic root of 13945280 is about 240.6998093140.

The spelling of 13945280 in words is "thirteen million, nine hundred forty-five thousand, two hundred eighty".