642304652 has 48 divisors (see below), whose sum is σ = 1303706880. Its totient is φ = 273816000.

The previous prime is 642304639. The next prime is 642304661. The reversal of 642304652 is 256403246.

It is a super-2 number, since 2×642304652² = 825110531961682208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80633 + ... + 88239.

It is an arithmetic number, because the mean of its divisors is an integer number (27160560).

Almost surely, 2^642304652 is an apocalyptic number.

It is an amenable number.

642304652 is an abundant number, since it is smaller than the sum of its proper divisors (661402228).

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

642304652 is a wasteful number, since it uses less digits than its factorization.

642304652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7742 (or 7740 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 32.

The square root of 642304652 is about 25343.7300332844. The cubic root of 642304652 is about 862.8070581293.

Adding to 642304652 its reverse (256403246), we get a palindrome (898707898).

The spelling of 642304652 in words is "six hundred forty-two million, three hundred four thousand, six hundred fifty-two".