820974 has 32 divisors (see below), whose sum is σ = 2048256. Its totient is φ = 213120.

The previous prime is 820969. The next prime is 820991. The reversal of 820974 is 479028.

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 15 ways as a sum of consecutive naturals, for example, 427 + ... + 1350.

It is an arithmetic number, because the mean of its divisors is an integer number (64008).

2⁸²⁰⁹⁷⁴ is an apocalyptic number.

820974 is an abundant number, since it is smaller than the sum of its proper divisors (1227282).

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

820974 is a wasteful number, since it uses less digits than its factorization.

820974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 820974 is about 906.0761557397. The cubic root of 820974 is about 93.6360606908.

The spelling of 820974 in words is "eight hundred twenty thousand, nine hundred seventy-four".