642346886 has 8 divisors (see below), whose sum is σ = 964302960. Its totient is φ = 320912568.

The previous prime is 642346849. The next prime is 642346931. The reversal of 642346886 is 688643246.

642346886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 642346886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127346 + ... + 132293.

It is an arithmetic number, because the mean of its divisors is an integer number (120537870).

Almost surely, 2^642346886 is an apocalyptic number.

642346886 is a deficient number, since it is larger than the sum of its proper divisors (321956074).

642346886 is a wasteful number, since it uses less digits than its factorization.

642346886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260878.

The product of its digits is 1327104, while the sum is 47.

The square root of 642346886 is about 25344.5632434256. The cubic root of 642346886 is about 862.8259686751.

The spelling of 642346886 in words is "six hundred forty-two million, three hundred forty-six thousand, eight hundred eighty-six".