13813788 has 48 divisors (see below), whose sum is σ = 33264000. Its totient is φ = 4459968.

The previous prime is 13813783. The next prime is 13813799. The reversal of 13813788 is 88731831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13813783) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77083 + ... + 77261.

It is an arithmetic number, because the mean of its divisors is an integer number (693000).

Almost surely, 2^13813788 is an apocalyptic number.

It is an amenable number.

13813788 is an abundant number, since it is smaller than the sum of its proper divisors (19450212).

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

13813788 is a wasteful number, since it uses less digits than its factorization.

13813788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 354 (or 352 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 13813788 is about 3716.6904633020. The cubic root of 13813788 is about 239.9408882198.

The spelling of 13813788 in words is "thirteen million, eight hundred thirteen thousand, seven hundred eighty-eight".