422228772 has 144 divisors (see below), whose sum is σ = 1252392960. Its totient is φ = 117464256.

The previous prime is 422228771. The next prime is 422228789. The reversal of 422228772 is 277822224.

422228772 is a `hidden beast` number, since 422 + 228 + 7 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (422228771) 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 47 ways as a sum of consecutive naturals, for example, 2528233 + ... + 2528399.

Almost surely, 2^422228772 is an apocalyptic number.

422228772 is a gapful number since it is divisible by the number (42) 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 422228772, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (626196480).

422228772 is an abundant number, since it is smaller than the sum of its proper divisors (830164188).

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

422228772 is a wasteful number, since it uses less digits than its factorization.

422228772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390 (or 385 counting only the distinct ones).

The product of its digits is 50176, while the sum is 36.

The square root of 422228772 is about 20548.2060530841. The cubic root of 422228772 is about 750.2095840939.

The spelling of 422228772 in words is "four hundred twenty-two million, two hundred twenty-eight thousand, seven hundred seventy-two".