642576732 has 96 divisors (see below), whose sum is σ = 1809722880. Its totient is φ = 173352960.

The previous prime is 642576721. The next prime is 642576811. The reversal of 642576732 is 237675246.

642576732 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 728932 + ... + 729812.

It is an arithmetic number, because the mean of its divisors is an integer number (18851280).

Almost surely, 2^642576732 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 642576732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (904861440).

642576732 is an abundant number, since it is smaller than the sum of its proper divisors (1167146148).

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

642576732 is a wasteful number, since it uses less digits than its factorization.

642576732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1371 (or 1369 counting only the distinct ones).

The product of its digits is 423360, while the sum is 42.

The square root of 642576732 is about 25349.0972620328. The cubic root of 642576732 is about 862.9288691756.

The spelling of 642576732 in words is "six hundred forty-two million, five hundred seventy-six thousand, seven hundred thirty-two".