13791388 has 24 divisors (see below), whose sum is σ = 26101712. Its totient is φ = 6338304.

The previous prime is 13791377. The next prime is 13791389. The reversal of 13791388 is 88319731.

It is a self number, because there is not a number n which added to its sum of digits gives 13791388.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13791389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17131 + ... + 17917.

Almost surely, 2^13791388 is an apocalyptic number.

It is an amenable number.

13791388 is a deficient number, since it is larger than the sum of its proper divisors (12310324).

13791388 is a wasteful number, since it uses less digits than its factorization.

13791388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1141 (or 1139 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 13791388 is about 3713.6758070677. The cubic root of 13791388 is about 239.8111245457.

The spelling of 13791388 in words is "thirteen million, seven hundred ninety-one thousand, three hundred eighty-eight".