642644024 has 16 divisors (see below), whose sum is σ = 1314499320. Its totient is φ = 292110880.

The previous prime is 642643999. The next prime is 642644029. The reversal of 642644024 is 420446246.

642644024 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642644029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3651299 + ... + 3651474.

Almost surely, 2^642644024 is an apocalyptic number.

It is an amenable number.

642644024 is an abundant number, since it is smaller than the sum of its proper divisors (671855296).

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

642644024 is a wasteful number, since it uses less digits than its factorization.

642644024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7302790 (or 7302786 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 642644024 is about 25350.4245329344. The cubic root of 642644024 is about 862.9589907054.

The spelling of 642644024 in words is "six hundred forty-two million, six hundred forty-four thousand, twenty-four".