422640232 has 64 divisors (see below), whose sum is σ = 929646720. Its totient is φ = 176387328.

The previous prime is 422640181. The next prime is 422640241. The reversal of 422640232 is 232046224.

It is a junction number, because it is equal to n+sod(n) for n = 422640197 and 422640206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465523 + ... + 466429.

It is an arithmetic number, because the mean of its divisors is an integer number (14525730).

Almost surely, 2^422640232 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 422640232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (464823360).

422640232 is an abundant number, since it is smaller than the sum of its proper divisors (507006488).

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

422640232 is a wasteful number, since it uses less digits than its factorization.

422640232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130 (or 1126 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 422640232 is about 20558.2156813280. The cubic root of 422640232 is about 750.4531969097.

Adding to 422640232 its reverse (232046224), we get a palindrome (654686456).

The spelling of 422640232 in words is "four hundred twenty-two million, six hundred forty thousand, two hundred thirty-two".