13873820 has 12 divisors (see below), whose sum is σ = 29135064. Its totient is φ = 5549520.

The previous prime is 13873799. The next prime is 13873823. The reversal of 13873820 is 2837831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13873823) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 346826 + ... + 346865.

It is an arithmetic number, because the mean of its divisors is an integer number (2427922).

Almost surely, 2^13873820 is an apocalyptic number.

13873820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13873820 is an abundant number, since it is smaller than the sum of its proper divisors (15261244).

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

13873820 is a wasteful number, since it uses less digits than its factorization.

13873820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693700 (or 693698 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 13873820 is about 3724.7577102410. The cubic root of 13873820 is about 240.2879645321.

The spelling of 13873820 in words is "thirteen million, eight hundred seventy-three thousand, eight hundred twenty".