422897872 has 40 divisors (see below), whose sum is σ = 869051520. Its totient is φ = 198929280.

The previous prime is 422897861. The next prime is 422897911. The reversal of 422897872 is 278798224.

It is a super-2 number, since 2×422897872² = 357685220284256768, which contains 22 as substring.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13029 + ... + 31867.

It is an arithmetic number, because the mean of its divisors is an integer number (21726288).

Almost surely, 2^422897872 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 422897872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (434525760).

422897872 is an abundant number, since it is smaller than the sum of its proper divisors (446153648).

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

422897872 is a wasteful number, since it uses less digits than its factorization.

422897872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18931 (or 18925 counting only the distinct ones).

The product of its digits is 903168, while the sum is 49.

The square root of 422897872 is about 20564.4808346819. The cubic root of 422897872 is about 750.6056571446.

The spelling of 422897872 in words is "four hundred twenty-two million, eight hundred ninety-seven thousand, eight hundred seventy-two".