13618988 has 6 divisors (see below), whose sum is σ = 23833236. Its totient is φ = 6809492.

The previous prime is 13618981. The next prime is 13618993. The reversal of 13618988 is 88981631.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (13618981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1702370 + ... + 1702377.

It is an arithmetic number, because the mean of its divisors is an integer number (3972206).

Almost surely, 2^13618988 is an apocalyptic number.

It is an amenable number.

13618988 is a deficient number, since it is larger than the sum of its proper divisors (10214248).

13618988 is a wasteful number, since it uses less digits than its factorization.

13618988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3404751 (or 3404749 counting only the distinct ones).

The product of its digits is 82944, while the sum is 44.

The square root of 13618988 is about 3690.3913071651. The cubic root of 13618988 is about 238.8076742696.

The spelling of 13618988 in words is "thirteen million, six hundred eighteen thousand, nine hundred eighty-eight".