642220700 has 72 divisors (see below), whose sum is σ = 1528068864. Its totient is φ = 232344000.

The previous prime is 642220637. The next prime is 642220703. The reversal of 642220700 is 7022246.

642220700 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642220703) 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 23 ways as a sum of consecutive naturals, for example, 230717 + ... + 233483.

Almost surely, 2^642220700 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 642220700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (764034432).

642220700 is an abundant number, since it is smaller than the sum of its proper divisors (885848164).

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

642220700 is a wasteful number, since it uses less digits than its factorization.

642220700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3003 (or 2996 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 642220700 is about 25342.0737115178. The cubic root of 642220700 is about 862.7694656182.

Adding to 642220700 its reverse (7022246), we get a palindrome (649242946).

The spelling of 642220700 in words is "six hundred forty-two million, two hundred twenty thousand, seven hundred".