1218988 has 12 divisors (see below), whose sum is σ = 2145640. Its totient is φ = 605952.

The previous prime is 1218953. The next prime is 1218989. The reversal of 1218988 is 8898121.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (1218989) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18 + ... + 1561.

2^1218988 is an apocalyptic number.

It is an amenable number.

1218988 is a deficient number, since it is larger than the sum of its proper divisors (926652).

1218988 is a wasteful number, since it uses less digits than its factorization.

1218988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776 (or 1774 counting only the distinct ones).

The product of its digits is 9216, while the sum is 37.

The square root of 1218988 is about 1104.0778958026. The cubic root of 1218988 is about 106.8234197028.

The spelling of 1218988 in words is "one million, two hundred eighteen thousand, nine hundred eighty-eight".