642275620 has 96 divisors (see below), whose sum is σ = 1641427200. Its totient is φ = 206198784.

The previous prime is 642275597. The next prime is 642275653. The reversal of 642275620 is 26572246.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 235384 + ... + 238096.

It is an arithmetic number, because the mean of its divisors is an integer number (17098200).

Almost surely, 2^642275620 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 642275620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (820713600).

642275620 is an abundant number, since it is smaller than the sum of its proper divisors (999151580).

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

642275620 is a wasteful number, since it uses less digits than its factorization.

642275620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2837 (or 2835 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 34.

The square root of 642275620 is about 25343.1572618725. The cubic root of 642275620 is about 862.7940583833.

The spelling of 642275620 in words is "six hundred forty-two million, two hundred seventy-five thousand, six hundred twenty".