13938740 has 12 divisors (see below), whose sum is σ = 29271396. Its totient is φ = 5575488.

The previous prime is 13938739. The next prime is 13938779. The reversal of 13938740 is 4783931.

It can be written as a sum of positive squares in 2 ways, for example, as 3467044 + 10471696 = 1862^2 + 3236^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13938740.

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, 348449 + ... + 348488.

It is an arithmetic number, because the mean of its divisors is an integer number (2439283).

Almost surely, 2^13938740 is an apocalyptic number.

13938740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13938740 is an abundant number, since it is smaller than the sum of its proper divisors (15332656).

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

13938740 is a wasteful number, since it uses less digits than its factorization.

13938740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696946 (or 696944 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 13938740 is about 3733.4622001568. The cubic root of 13938740 is about 240.6621759619.

The spelling of 13938740 in words is "thirteen million, nine hundred thirty-eight thousand, seven hundred forty".