642598432 has 48 divisors (see below), whose sum is σ = 1449911232. Its totient is φ = 274625280.

The previous prime is 642598427. The next prime is 642598471. The reversal of 642598432 is 234895246.

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 7 ways as a sum of consecutive naturals, for example, 79707 + ... + 87397.

It is an arithmetic number, because the mean of its divisors is an integer number (30206484).

Almost surely, 2^642598432 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 642598432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (724955616).

642598432 is an abundant number, since it is smaller than the sum of its proper divisors (807312800).

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

642598432 is a wasteful number, since it uses less digits than its factorization.

642598432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8081 (or 8073 counting only the distinct ones).

The product of its digits is 414720, while the sum is 43.

The square root of 642598432 is about 25349.5252815511. The cubic root of 642598432 is about 862.9385828511.

The spelling of 642598432 in words is "six hundred forty-two million, five hundred ninety-eight thousand, four hundred thirty-two".