642082724 has 24 divisors (see below), whose sum is σ = 1200284568. Its totient is φ = 299479040.

The previous prime is 642082699. The next prime is 642082747. The reversal of 642082724 is 427280246.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1081600 + 641001124 = 1040^2 + 25318^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34097 + ... + 49464.

It is an arithmetic number, because the mean of its divisors is an integer number (50011857).

Almost surely, 2^642082724 is an apocalyptic number.

It is an amenable number.

642082724 is a deficient number, since it is larger than the sum of its proper divisors (558201844).

642082724 is a wasteful number, since it uses less digits than its factorization.

642082724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83695 (or 83693 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 642082724 is about 25339.3512939854. The cubic root of 642082724 is about 862.7076748113.

The spelling of 642082724 in words is "six hundred forty-two million, eighty-two thousand, seven hundred twenty-four".