99840806 has 12 divisors (see below), whose sum is σ = 162168012. Its totient is φ = 46080216.

The previous prime is 99840791. The next prime is 99840809. The reversal of 99840806 is 60804899.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99840809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147356 + ... + 148031.

It is an arithmetic number, because the mean of its divisors is an integer number (13514001).

Almost surely, 2^99840806 is an apocalyptic number.

99840806 is a deficient number, since it is larger than the sum of its proper divisors (62327206).

99840806 is a wasteful number, since it uses less digits than its factorization.

99840806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295415 (or 295402 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 99840806 is about 9992.0371296348. The cubic root of 99840806 is about 463.9124481807.

The spelling of 99840806 in words is "ninety-nine million, eight hundred forty thousand, eight hundred six".