642488830 has 16 divisors (see below), whose sum is σ = 1171120320. Its totient is φ = 253742112.

The previous prime is 642488789. The next prime is 642488839. The reversal of 642488830 is 38884246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642488839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405849 + ... + 407428.

It is an arithmetic number, because the mean of its divisors is an integer number (73195020).

Almost surely, 2^642488830 is an apocalyptic number.

642488830 is a deficient number, since it is larger than the sum of its proper divisors (528631490).

642488830 is a wasteful number, since it uses less digits than its factorization.

642488830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813363.

The product of its (nonzero) digits is 294912, while the sum is 43.

The square root of 642488830 is about 25347.3633737318. The cubic root of 642488830 is about 862.8895189425.

The spelling of 642488830 in words is "six hundred forty-two million, four hundred eighty-eight thousand, eight hundred thirty".