812988 has 36 divisors (see below), whose sum is σ = 2242968. Its totient is φ = 246240.

The previous prime is 812969. The next prime is 813013. The reversal of 812988 is 889218.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 812988.

It is an unprimeable number.

812988 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 631 + ... + 1422.

2⁸¹²⁹⁸⁸ is an apocalyptic number.

It is an amenable number.

812988 is an abundant number, since it is smaller than the sum of its proper divisors (1429980).

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

812988 is a wasteful number, since it uses less digits than its factorization.

812988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2074 (or 2069 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 812988 is about 901.6584719283. The cubic root of 812988 is about 93.3314568784.

It can be divided in two parts, 8 and 12988, that added together give a square (12996 = 114²).

The spelling of 812988 in words is "eight hundred twelve thousand, nine hundred eighty-eight".