13957820 has 12 divisors (see below), whose sum is σ = 29311464. Its totient is φ = 5583120.

The previous prime is 13957817. The next prime is 13957841. The reversal of 13957820 is 2875931.

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, 348926 + ... + 348965.

It is an arithmetic number, because the mean of its divisors is an integer number (2442622).

Almost surely, 2^13957820 is an apocalyptic number.

13957820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13957820 is an abundant number, since it is smaller than the sum of its proper divisors (15353644).

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

13957820 is a wasteful number, since it uses less digits than its factorization.

13957820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697900 (or 697898 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 13957820 is about 3736.0165952522. The cubic root of 13957820 is about 240.7719357808.

The spelling of 13957820 in words is "thirteen million, nine hundred fifty-seven thousand, eight hundred twenty".