868989806 has 4 divisors (see below), whose sum is σ = 1303484712. Its totient is φ = 434494902.

The previous prime is 868989791. The next prime is 868989811. The reversal of 868989806 is 608989868.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217247450 + ... + 217247453.

It is an arithmetic number, because the mean of its divisors is an integer number (325871178).

Almost surely, 2^868989806 is an apocalyptic number.

868989806 is a deficient number, since it is larger than the sum of its proper divisors (434494906).

868989806 is a wasteful number, since it uses less digits than its factorization.

868989806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434494905.

The product of its (nonzero) digits is 11943936, while the sum is 62.

The square root of 868989806 is about 29478.6330415778. The cubic root of 868989806 is about 954.2706366936.

Adding to 868989806 its sum of digits (62), we get a palindrome (868989868).

The spelling of 868989806 in words is "eight hundred sixty-eight million, nine hundred eighty-nine thousand, eight hundred six".