13937640 has 64 divisors (see below), whose sum is σ = 44020800. Its totient is φ = 3520512.

The previous prime is 13937617. The next prime is 13937657. The reversal of 13937640 is 4673931.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 777 + ... + 5336.

It is an arithmetic number, because the mean of its divisors is an integer number (687825).

Almost surely, 2^13937640 is an apocalyptic number.

13937640 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 13937640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22010400).

13937640 is an abundant number, since it is smaller than the sum of its proper divisors (30083160).

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

13937640 is a wasteful number, since it uses less digits than its factorization.

13937640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6146 (or 6142 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 13937640 is about 3733.3148809068. The cubic root of 13937640 is about 240.6558450367.

The spelling of 13937640 in words is "thirteen million, nine hundred thirty-seven thousand, six hundred forty".