13998940 has 12 divisors (see below), whose sum is σ = 29397816. Its totient is φ = 5599568.

The previous prime is 13998937. The next prime is 13999003. The reversal of 13998940 is 4989931.

It is a super-2 number, since 2×13998940² = 391940642247200, which contains 22 as substring.

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, 349954 + ... + 349993.

It is an arithmetic number, because the mean of its divisors is an integer number (2449818).

Almost surely, 2^13998940 is an apocalyptic number.

13998940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13998940 is an abundant number, since it is smaller than the sum of its proper divisors (15398876).

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

13998940 is a wasteful number, since it uses less digits than its factorization.

13998940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699956 (or 699954 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 13998940 is about 3741.5157356344. The cubic root of 13998940 is about 241.0081435240.

Subtracting from 13998940 its reverse (4989931), we obtain a palindrome (9009009).

The spelling of 13998940 in words is "thirteen million, nine hundred ninety-eight thousand, nine hundred forty".