820074 has 16 divisors (see below), whose sum is σ = 1693440. Its totient is φ = 264480.

The previous prime is 820073. The next prime is 820093. The reversal of 820074 is 470028.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 820074.

It is not an unprimeable number, because it can be changed into a prime (820073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2019 + ... + 2390.

It is an arithmetic number, because the mean of its divisors is an integer number (105840).

2⁸²⁰⁰⁷⁴ is an apocalyptic number.

820074 is an abundant number, since it is smaller than the sum of its proper divisors (873366).

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

820074 is a wasteful number, since it uses less digits than its factorization.

820074 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4445.

The product of its (nonzero) digits is 448, while the sum is 21.

The square root of 820074 is about 905.5793725566. The cubic root of 820074 is about 93.6018317269.

The spelling of 820074 in words is "eight hundred twenty thousand, seventy-four".