820285370 has 32 divisors (see below), whose sum is σ = 1486902528. Its totient is φ = 325816128.

The previous prime is 820285369. The next prime is 820285373. The reversal of 820285370 is 73582028.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 820285370.

It is not an unprimeable number, because it can be changed into a prime (820285373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1456709 + ... + 1457271.

It is an arithmetic number, because the mean of its divisors is an integer number (46465704).

Almost surely, 2^820285370 is an apocalyptic number.

820285370 is a deficient number, since it is larger than the sum of its proper divisors (666617158).

820285370 is a wasteful number, since it uses less digits than its factorization.

820285370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1334.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 820285370 is about 28640.6244694490. The cubic root of 820285370 is about 936.0987283847.

The spelling of 820285370 in words is "eight hundred twenty million, two hundred eighty-five thousand, three hundred seventy".