13899880 has 32 divisors (see below), whose sum is σ = 33116040. Its totient is φ = 5232640.

The previous prime is 13899877. The next prime is 13899881. The reversal of 13899880 is 8899831.

It can be written as a sum of positive squares in 4 ways, for example, as 13675204 + 224676 = 3698^2 + 474^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13899880.

It is not an unprimeable number, because it can be changed into a prime (13899881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9541 + ... + 10900.

Almost surely, 2^13899880 is an apocalyptic number.

13899880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13899880 is an abundant number, since it is smaller than the sum of its proper divisors (19216160).

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

13899880 is a wasteful number, since it uses less digits than its factorization.

13899880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20469 (or 20465 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 13899880 is about 3728.2542831733. The cubic root of 13899880 is about 240.4383193669.

The spelling of 13899880 in words is "thirteen million, eight hundred ninety-nine thousand, eight hundred eighty".