422028612 has 72 divisors (see below), whose sum is σ = 1091674584. Its totient is φ = 137419776.

The previous prime is 422028583. The next prime is 422028647. The reversal of 422028612 is 216820224.

It is a happy number.

422028612 is a `hidden beast` number, since 4 + 2 + 20 + 28 + 612 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 129413376 + 292615236 = 11376^2 + 17106^2 .

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 711388 + ... + 711980.

It is an arithmetic number, because the mean of its divisors is an integer number (15162147).

Almost surely, 2^422028612 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 422028612, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (545837292).

422028612 is an abundant number, since it is smaller than the sum of its proper divisors (669645972).

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

422028612 is a wasteful number, since it uses less digits than its factorization.

422028612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1029 (or 1024 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 422028612 is about 20543.3349775542. The cubic root of 422028612 is about 750.0910182871.

Adding to 422028612 its reverse (216820224), we get a palindrome (638848836).

The spelling of 422028612 in words is "four hundred twenty-two million, twenty-eight thousand, six hundred twelve".