422100728 has 32 divisors (see below), whose sum is σ = 925541760. Its totient is φ = 176692320.

The previous prime is 422100709. The next prime is 422100739. The reversal of 422100728 is 827001224.

It is a junction number, because it is equal to n+sod(n) for n = 422100697 and 422100706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85238 + ... + 90053.

It is an arithmetic number, because the mean of its divisors is an integer number (28923180).

Almost surely, 2^422100728 is an apocalyptic number.

It is an amenable number.

422100728 is an abundant number, since it is smaller than the sum of its proper divisors (503441032).

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

422100728 is a wasteful number, since it uses less digits than its factorization.

422100728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175347 (or 175343 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 422100728 is about 20545.0901190528. The cubic root of 422100728 is about 750.1337408905.

The spelling of 422100728 in words is "four hundred twenty-two million, one hundred thousand, seven hundred twenty-eight".