642800886 has 32 divisors (see below), whose sum is σ = 1582280448. Its totient is φ = 169529760.

The previous prime is 642800827. The next prime is 642800891. The reversal of 642800886 is 688008246.

642800886 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 588100 + ... + 589191.

It is an arithmetic number, because the mean of its divisors is an integer number (49446264).

Almost surely, 2^642800886 is an apocalyptic number.

642800886 is an abundant number, since it is smaller than the sum of its proper divisors (939479562).

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

642800886 is a wasteful number, since it uses less digits than its factorization.

642800886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177316.

The product of its (nonzero) digits is 147456, while the sum is 42.

The square root of 642800886 is about 25353.5182173993. The cubic root of 642800886 is about 863.0291977749.

The spelling of 642800886 in words is "six hundred forty-two million, eight hundred thousand, eight hundred eighty-six".