13956820 has 24 divisors (see below), whose sum is σ = 30256128. Its totient is φ = 5402400.

The previous prime is 13956799. The next prime is 13956823. The reversal of 13956820 is 2865931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13956823) 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, 10636 + ... + 11875.

It is an arithmetic number, because the mean of its divisors is an integer number (1260672).

Almost surely, 2^13956820 is an apocalyptic number.

13956820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13956820 is an abundant number, since it is smaller than the sum of its proper divisors (16299308).

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

13956820 is a wasteful number, since it uses less digits than its factorization.

13956820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22551 (or 22549 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 13956820 is about 3735.8827604731. The cubic root of 13956820 is about 240.7661856544.

The spelling of 13956820 in words is "thirteen million, nine hundred fifty-six thousand, eight hundred twenty".