422765728 has 144 divisors (see below), whose sum is σ = 1070060544. Its totient is φ = 162570240.

The previous prime is 422765671. The next prime is 422765731. The reversal of 422765728 is 827567224.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2190400 + ... + 2190592.

It is an arithmetic number, because the mean of its divisors is an integer number (7430976).

Almost surely, 2^422765728 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 422765728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (535030272).

422765728 is an abundant number, since it is smaller than the sum of its proper divisors (647294816).

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

422765728 is a wasteful number, since it uses less digits than its factorization.

422765728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355 (or 340 counting only the distinct ones).

The product of its digits is 376320, while the sum is 43.

The square root of 422765728 is about 20561.2676652000. The cubic root of 422765728 is about 750.5274677649.

The spelling of 422765728 in words is "four hundred twenty-two million, seven hundred sixty-five thousand, seven hundred twenty-eight".