422091972 has 72 divisors (see below), whose sum is σ = 1111926816. Its totient is φ = 140004288.

The previous prime is 422091941. The next prime is 422091977. The reversal of 422091972 is 279190224.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (422091977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 219688 + ... + 221600.

It is an arithmetic number, because the mean of its divisors is an integer number (15443428).

Almost surely, 2^422091972 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 422091972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (555963408).

422091972 is an abundant number, since it is smaller than the sum of its proper divisors (689834844).

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

422091972 is a wasteful number, since it uses less digits than its factorization.

422091972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159 (or 2145 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 422091972 is about 20544.8770256724. The cubic root of 422091972 is about 750.1285539639.

The spelling of 422091972 in words is "four hundred twenty-two million, ninety-one thousand, nine hundred seventy-two".