13949880 has 64 divisors (see below), whose sum is σ = 47831040. Its totient is φ = 3188352.

The previous prime is 13949863. The next prime is 13949909. The reversal of 13949880 is 8894931.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7464 + ... + 9143.

It is an arithmetic number, because the mean of its divisors is an integer number (747360).

Almost surely, 2^13949880 is an apocalyptic number.

13949880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13949880 is an abundant number, since it is smaller than the sum of its proper divisors (33881160).

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

13949880 is a wasteful number, since it uses less digits than its factorization.

13949880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16628 (or 16624 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 13949880 is about 3734.9538149755. The cubic root of 13949880 is about 240.7262722081.

The spelling of 13949880 in words is "thirteen million, nine hundred forty-nine thousand, eight hundred eighty".