642429498 has 16 divisors (see below), whose sum is σ = 1296868320. Its totient is φ = 212141616.

The previous prime is 642429497. The next prime is 642429509. The reversal of 642429498 is 894924246.

It is not an unprimeable number, because it can be changed into a prime (642429493) 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, 499693 + ... + 500976.

It is an arithmetic number, because the mean of its divisors is an integer number (81054270).

Almost surely, 2^642429498 is an apocalyptic number.

642429498 is an abundant number, since it is smaller than the sum of its proper divisors (654438822).

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

642429498 is a wasteful number, since it uses less digits than its factorization.

642429498 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000781.

The product of its digits is 995328, while the sum is 48.

The square root of 642429498 is about 25346.1929685703. The cubic root of 642429498 is about 862.8629563344.

The spelling of 642429498 in words is "six hundred forty-two million, four hundred twenty-nine thousand, four hundred ninety-eight".