422626890 has 64 divisors (see below), whose sum is σ = 1166006016. Its totient is φ = 96033792.

The previous prime is 422626877. The next prime is 422626891. The reversal of 422626890 is 98626224.

It is a super-2 number, since 2×422626890² = 357226976302144200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (422626891) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30514 + ... + 42146.

It is an arithmetic number, because the mean of its divisors is an integer number (18218844).

Almost surely, 2^422626890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422626890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (583003008).

422626890 is an abundant number, since it is smaller than the sum of its proper divisors (743379126).

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

422626890 is a wasteful number, since it uses less digits than its factorization.

422626890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11823.

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 422626890 is about 20557.8911856250. The cubic root of 422626890 is about 750.4453000027.

The spelling of 422626890 in words is "four hundred twenty-two million, six hundred twenty-six thousand, eight hundred ninety".