1316988 has 18 divisors (see below), whose sum is σ = 3329144. Its totient is φ = 438984.

The previous prime is 1316983. The next prime is 1316989. The reversal of 1316988 is 8896131.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 36583 = 1316988 / (1 + 3 + 1 + 6 + 9 + 8 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1316983) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18256 + ... + 18327.

2^1316988 is an apocalyptic number.

1316988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1316988 is an abundant number, since it is smaller than the sum of its proper divisors (2012156).

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

1316988 is a wasteful number, since it uses less digits than its factorization.

1316988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36593 (or 36588 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 1316988 is about 1147.6009759494. The cubic root of 1316988 is about 109.6126319644.

It can be divided in two parts, 1316 and 988, that added together give a square (2304 = 48²).

The spelling of 1316988 in words is "one million, three hundred sixteen thousand, nine hundred eighty-eight".