422222640 has 80 divisors (see below), whose sum is σ = 1495880448. Its totient is φ = 96507648.

The previous prime is 422222627. The next prime is 422222653. The reversal of 422222640 is 46222224.

It is an interprime number because it is at equal distance from previous prime (422222627) and next prime (422222653).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 422222640.

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 15 ways as a sum of consecutive naturals, for example, 123982 + ... + 127341.

Almost surely, 2^422222640 is an apocalyptic number.

422222640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

422222640 is an abundant number, since it is smaller than the sum of its proper divisors (1073657808).

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

422222640 is a wasteful number, since it uses less digits than its factorization.

422222640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251346 (or 251340 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 422222640 is about 20548.0568424365. The cubic root of 422222640 is about 750.2059523286.

Adding to 422222640 its reverse (46222224), we get a palindrome (468444864).

It can be divided in two parts, 4222 and 22640, that added together give a palindrome (26862).

The spelling of 422222640 in words is "four hundred twenty-two million, two hundred twenty-two thousand, six hundred forty".