812980 has 24 divisors (see below), whose sum is σ = 1951488. Its totient is φ = 278688.

The previous prime is 812969. The next prime is 813013. The reversal of 812980 is 89218.

812980 = T₉₅ + T₉₆ + ... + T₁₇₈.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 2764 + ... + 3043.

It is an arithmetic number, because the mean of its divisors is an integer number (81312).

2⁸¹²⁹⁸⁰ is an apocalyptic number.

It is an amenable number.

812980 is an abundant number, since it is smaller than the sum of its proper divisors (1138508).

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

812980 is a wasteful number, since it uses less digits than its factorization.

812980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5823 (or 5821 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 812980 is about 901.6540356478. The cubic root of 812980 is about 93.3311507426.

The spelling of 812980 in words is "eight hundred twelve thousand, nine hundred eighty".