422359728 has 80 divisors (see below), whose sum is σ = 1259919360. Its totient is φ = 119420928.

The previous prime is 422359727. The next prime is 422359753. The reversal of 422359728 is 827953224.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 422359728.

It is not an unprimeable number, because it can be changed into a prime (422359723) by changing a digit.

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, 26113 + ... + 39071.

It is an arithmetic number, because the mean of its divisors is an integer number (15748992).

Almost surely, 2^422359728 is an apocalyptic number.

422359728 is a gapful number since it is divisible by the number (48) 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 422359728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (629959680).

422359728 is an abundant number, since it is smaller than the sum of its proper divisors (837559632).

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

422359728 is a wasteful number, since it uses less digits than its factorization.

422359728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13074 (or 13068 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 422359728 is about 20551.3923615895. The cubic root of 422359728 is about 750.2871362785.

The spelling of 422359728 in words is "four hundred twenty-two million, three hundred fifty-nine thousand, seven hundred twenty-eight".