1022731820 has 48 divisors (see below), whose sum is σ = 2345849856. Its totient is φ = 371448000.

The previous prime is 1022731817. The next prime is 1022731859. The reversal of 1022731820 is 281372201.

It is a self number, because there is not a number n which added to its sum of digits gives 1022731820.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215675 + ... + 220365.

It is an arithmetic number, because the mean of its divisors is an integer number (48871872).

Almost surely, 2^1022731820 is an apocalyptic number.

1022731820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1022731820 is an abundant number, since it is smaller than the sum of its proper divisors (1323118036).

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

1022731820 is a wasteful number, since it uses less digits than its factorization.

1022731820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5702 (or 5700 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 1022731820 is about 31980.1785485948. The cubic root of 1022731820 is about 1007.5205725367.

The spelling of 1022731820 in words is "one billion, twenty-two million, seven hundred thirty-one thousand, eight hundred twenty".