1022191008 has 96 divisors (see below), whose sum is σ = 2823387840. Its totient is φ = 323389440.

The previous prime is 1022190973. The next prime is 1022191031. The reversal of 1022191008 is 8001912201.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142123 + ... + 149141.

It is an arithmetic number, because the mean of its divisors is an integer number (29410290).

Almost surely, 2^1022191008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1022191008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1411693920).

1022191008 is an abundant number, since it is smaller than the sum of its proper divisors (1801196832).

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

1022191008 is a wasteful number, since it uses less digits than its factorization.

1022191008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7110 (or 7102 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 1022191008 is about 31971.7220055473. The cubic root of 1022191008 is about 1007.3429517515.

The spelling of 1022191008 in words is "one billion, twenty-two million, one hundred ninety-one thousand, eight".