642284472 has 16 divisors (see below), whose sum is σ = 1605711240. Its totient is φ = 214094816.

The previous prime is 642284459. The next prime is 642284479. The reversal of 642284472 is 274482246.

642284472 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 642284472.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642284479) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13380903 + ... + 13380950.

Almost surely, 2^642284472 is an apocalyptic number.

It is an amenable number.

642284472 is an abundant number, since it is smaller than the sum of its proper divisors (963426768).

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

642284472 is a wasteful number, since it uses less digits than its factorization.

642284472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26761862 (or 26761858 counting only the distinct ones).

The product of its digits is 172032, while the sum is 39.

The square root of 642284472 is about 25343.3319040729. The cubic root of 642284472 is about 862.7980221115.

The spelling of 642284472 in words is "six hundred forty-two million, two hundred eighty-four thousand, four hundred seventy-two".