642734624 has 24 divisors (see below), whose sum is σ = 1446153408. Its totient is φ = 275457600.

The previous prime is 642734581. The next prime is 642734629. The reversal of 642734624 is 426437246.

It is not an unprimeable number, because it can be changed into a prime (642734629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1434452 + ... + 1434899.

It is an arithmetic number, because the mean of its divisors is an integer number (60256392).

Almost surely, 2^642734624 is an apocalyptic number.

It is an amenable number.

642734624 is an abundant number, since it is smaller than the sum of its proper divisors (803418784).

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

642734624 is a wasteful number, since it uses less digits than its factorization.

642734624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869368 (or 2869360 counting only the distinct ones).

The product of its digits is 193536, while the sum is 38.

The square root of 642734624 is about 25352.2114222803. The cubic root of 642734624 is about 862.9995421397. Note that the first 3 decimals are identical.

The spelling of 642734624 in words is "six hundred forty-two million, seven hundred thirty-four thousand, six hundred twenty-four".