422636520 has 64 divisors (see below), whose sum is σ = 1280499840. Its totient is φ = 111584000.

The previous prime is 422636519. The next prime is 422636521. The reversal of 422636520 is 25636224.

It is an interprime number because it is at equal distance from previous prime (422636519) and next prime (422636521).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (422636521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5316 + ... + 29555.

It is an arithmetic number, because the mean of its divisors is an integer number (20007810).

Almost surely, 2^422636520 is an apocalyptic number.

422636520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 422636520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (640249920).

422636520 is an abundant number, since it is smaller than the sum of its proper divisors (857863320).

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

422636520 is a wasteful number, since it uses less digits than its factorization.

422636520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34986 (or 34982 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 422636520 is about 20558.1254009212. The cubic root of 422636520 is about 750.4509998556.

The spelling of 422636520 in words is "four hundred twenty-two million, six hundred thirty-six thousand, five hundred twenty".