642960500 has 144 divisors (see below), whose sum is σ = 1739372544. Its totient is φ = 203299200.

The previous prime is 642960499. The next prime is 642960503. The reversal of 642960500 is 5069246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642960503) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 590957 + ... + 592043.

It is an arithmetic number, because the mean of its divisors is an integer number (12078976).

Almost surely, 2^642960500 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 642960500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (869686272).

642960500 is an abundant number, since it is smaller than the sum of its proper divisors (1096412044).

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

642960500 is a wasteful number, since it uses less digits than its factorization.

642960500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1139 (or 1114 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 642960500 is about 25356.6657902809. The cubic root of 642960500 is about 863.1006248400.

The spelling of 642960500 in words is "six hundred forty-two million, nine hundred sixty thousand, five hundred".