642442098 has 48 divisors (see below), whose sum is σ = 1364467680. Its totient is φ = 201621312.

The previous prime is 642442069. The next prime is 642442103. The reversal of 642442098 is 890244246.

642442098 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 386886 + ... + 388542.

It is an arithmetic number, because the mean of its divisors is an integer number (28426410).

Almost surely, 2^642442098 is an apocalyptic number.

642442098 is an abundant number, since it is smaller than the sum of its proper divisors (722025582).

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

642442098 is a wasteful number, since it uses less digits than its factorization.

642442098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879 (or 1860 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 642442098 is about 25346.4415253897. The cubic root of 642442098 is about 862.8685974215.

The spelling of 642442098 in words is "six hundred forty-two million, four hundred forty-two thousand, ninety-eight".