422089728 has 44 divisors (see below), whose sum is σ = 1125031200. Its totient is φ = 140695552.

The previous prime is 422089727. The next prime is 422089757. The reversal of 422089728 is 827980224.

It is a super-2 number, since 2×422089728² = 356319476966227968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 422089728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (422089727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65628 + ... + 71771.

Almost surely, 2^422089728 is an apocalyptic number.

422089728 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

422089728 is an abundant number, since it is smaller than the sum of its proper divisors (702941472).

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

422089728 is a wasteful number, since it uses less digits than its factorization.

422089728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137422 (or 137404 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 42.

The square root of 422089728 is about 20544.8224134452. The cubic root of 422089728 is about 750.1272246395.

The spelling of 422089728 in words is "four hundred twenty-two million, eighty-nine thousand, seven hundred twenty-eight".