642274882 has 8 divisors (see below), whose sum is σ = 981590076. Its totient is φ = 315078192.

The previous prime is 642274873. The next prime is 642274889. The reversal of 642274882 is 288472246.

It can be written as a sum of positive squares in 2 ways, for example, as 622552401 + 19722481 = 24951^2 + 4441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×642274882² = 825034048096227848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (642274889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3029493 + ... + 3029704.

Almost surely, 2^642274882 is an apocalyptic number.

642274882 is a deficient number, since it is larger than the sum of its proper divisors (339315194).

642274882 is a wasteful number, since it uses less digits than its factorization.

642274882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6059252.

The product of its digits is 344064, while the sum is 43.

The square root of 642274882 is about 25343.1427017251. The cubic root of 642274882 is about 862.7937279217.

The spelling of 642274882 in words is "six hundred forty-two million, two hundred seventy-four thousand, eight hundred eighty-two".