13281988 has 12 divisors (see below), whose sum is σ = 24466960. Its totient is φ = 6291432.

The previous prime is 13281973. The next prime is 13282019. The reversal of 13281988 is 88918231.

It is a super-2 number, since 2×13281988² = 352822410464288, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13281988.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 87306 + ... + 87457.

Almost surely, 2^13281988 is an apocalyptic number.

It is an amenable number.

13281988 is a deficient number, since it is larger than the sum of its proper divisors (11184972).

13281988 is a wasteful number, since it uses less digits than its factorization.

13281988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174786 (or 174784 counting only the distinct ones).

The product of its digits is 27648, while the sum is 40.

The square root of 13281988 is about 3644.4461856364. The cubic root of 13281988 is about 236.8214456244.

The spelling of 13281988 in words is "thirteen million, two hundred eighty-one thousand, nine hundred eighty-eight".