308947806 has 24 divisors (see below), whose sum is σ = 670184424. Its totient is φ = 102859920.

The previous prime is 308947801. The next prime is 308947823. The reversal of 308947806 is 608749803.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (308947801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6001 + ... + 25571.

It is an arithmetic number, because the mean of its divisors is an integer number (27924351).

Almost surely, 2^308947806 is an apocalyptic number.

308947806 is an abundant number, since it is smaller than the sum of its proper divisors (361236618).

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

308947806 is a wasteful number, since it uses less digits than its factorization.

308947806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20456 (or 20453 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The square root of 308947806 is about 17576.9111620899. The cubic root of 308947806 is about 676.0233629287.

The spelling of 308947806 in words is "three hundred eight million, nine hundred forty-seven thousand, eight hundred six".