819222893790 has 384 divisors, whose sum is σ = 2461906206720. Its totient is φ = 170392273920.

The previous prime is 819222893653. The next prime is 819222893833. The reversal of 819222893790 is 97398222918.

It is a super-2 number, since 2×819222893790² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 449380819 + ... + 449382641.

It is an arithmetic number, because the mean of its divisors is an integer number (6411214080).

Almost surely, 2^819222893790 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 819222893790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1230953103360).

819222893790 is an abundant number, since it is smaller than the sum of its proper divisors (1642683312930).

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

819222893790 is a wasteful number, since it uses less digits than its factorization.

819222893790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2008 (or 1967 counting only the distinct ones).

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 819222893790 in words is "eight hundred nineteen billion, two hundred twenty-two million, eight hundred ninety-three thousand, seven hundred ninety".