642259084 has 24 divisors (see below), whose sum is σ = 1173731328. Its totient is φ = 306929040.

The previous prime is 642259081. The next prime is 642259097. The reversal of 642259084 is 480952246.

It is not an unprimeable number, because it can be changed into a prime (642259081) 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, 192559 + ... + 195865.

It is an arithmetic number, because the mean of its divisors is an integer number (48905472).

Almost surely, 2^642259084 is an apocalyptic number.

It is an amenable number.

642259084 is a deficient number, since it is larger than the sum of its proper divisors (531472244).

642259084 is a wasteful number, since it uses less digits than its factorization.

642259084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5445 (or 5443 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 642259084 is about 25342.8310178638. The cubic root of 642259084 is about 862.7866538337.

The spelling of 642259084 in words is "six hundred forty-two million, two hundred fifty-nine thousand, eighty-four".