608909805 has 40 divisors (see below), whose sum is σ = 1247465472. Its totient is φ = 278357472.

The previous prime is 608909803. The next prime is 608909867. The reversal of 608909805 is 508909806.

It is not a de Polignac number, because 608909805 - 2¹ = 608909803 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (608909803) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 104557 + ... + 110226.

Almost surely, 2^608909805 is an apocalyptic number.

It is an amenable number.

608909805 is an abundant number, since it is smaller than the sum of its proper divisors (638555667).

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

608909805 is a wasteful number, since it uses less digits than its factorization.

608909805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214807 (or 214798 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 608909805 is about 24676.0978479175. The cubic root of 608909805 is about 847.5870691342.

Subtracting from 608909805 its reverse (508909806), we obtain a palindrome (99999999).

The spelling of 608909805 in words is "six hundred eight million, nine hundred nine thousand, eight hundred five".