13991828 has 24 divisors (see below), whose sum is σ = 26147520. Its totient is φ = 6531840.

The previous prime is 13991827. The next prime is 13991839. The reversal of 13991828 is 82819931.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13991821) 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, 4100 + ... + 6692.

It is an arithmetic number, because the mean of its divisors is an integer number (1089480).

Almost surely, 2^13991828 is an apocalyptic number.

It is an amenable number.

13991828 is a deficient number, since it is larger than the sum of its proper divisors (12155692).

13991828 is a wasteful number, since it uses less digits than its factorization.

13991828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687 (or 2685 counting only the distinct ones).

The product of its digits is 31104, while the sum is 41.

The square root of 13991828 is about 3740.5651979347. The cubic root of 13991828 is about 240.9673228079.

The spelling of 13991828 in words is "thirteen million, nine hundred ninety-one thousand, eight hundred twenty-eight".