1091972022 has 32 divisors (see below), whose sum is σ = 2208384000. Its totient is φ = 359930208.

The previous prime is 1091971981. The next prime is 1091972027. The reversal of 1091972022 is 2202791901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1091972027) 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, 453979 + ... + 456377.

It is an arithmetic number, because the mean of its divisors is an integer number (69012000).

Almost surely, 2^1091972022 is an apocalyptic number.

1091972022 is an abundant number, since it is smaller than the sum of its proper divisors (1116411978).

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

1091972022 is a wasteful number, since it uses less digits than its factorization.

1091972022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3220.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 1091972022 is about 33044.9999546074. Note that the first 4 decimals coincide. The cubic root of 1091972022 is about 1029.7627322898.

The spelling of 1091972022 in words is "one billion, ninety-one million, nine hundred seventy-two thousand, twenty-two".