13538788 has 6 divisors (see below), whose sum is σ = 23692886. Its totient is φ = 6769392.

The previous prime is 13538779. The next prime is 13538813. The reversal of 13538788 is 88783531.

It can be written as a sum of positive squares in only one way, i.e., 13118884 + 419904 = 3622^2 + 648^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1692345 + ... + 1692352.

Almost surely, 2^13538788 is an apocalyptic number.

It is an amenable number.

13538788 is a deficient number, since it is larger than the sum of its proper divisors (10154098).

13538788 is a wasteful number, since it uses less digits than its factorization.

13538788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3384701 (or 3384699 counting only the distinct ones).

The product of its digits is 161280, while the sum is 43.

The square root of 13538788 is about 3679.5092064024. The cubic root of 13538788 is about 238.3379845974.

The spelling of 13538788 in words is "thirteen million, five hundred thirty-eight thousand, seven hundred eighty-eight".