13990812 has 48 divisors (see below), whose sum is σ = 36070272. Its totient is φ = 4185280.

The previous prime is 13990807. The next prime is 13990841. The reversal of 13990812 is 21809931.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10318 + ... + 11594.

It is an arithmetic number, because the mean of its divisors is an integer number (751464).

Almost surely, 2^13990812 is an apocalyptic number.

13990812 is a gapful number since it is divisible by the number (12) 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 13990812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18035136).

13990812 is an abundant number, since it is smaller than the sum of its proper divisors (22079460).

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

13990812 is a wasteful number, since it uses less digits than its factorization.

13990812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1378 (or 1376 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 13990812 is about 3740.4293871159. The cubic root of 13990812 is about 240.9614901479.

It can be divided in two parts, 139 and 90812, that added together give a triangular number (90951 = T₄₂₆).

The spelling of 13990812 in words is "thirteen million, nine hundred ninety thousand, eight hundred twelve".