79898805 has 40 divisors (see below), whose sum is σ = 163692672. Its totient is φ = 36523872.

The previous prime is 79898801. The next prime is 79898821. The reversal of 79898805 is 50889897.

It is not a de Polignac number, because 79898805 - 2² = 79898801 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79898801) 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, 11257 + ... + 16926.

Almost surely, 2^79898805 is an apocalyptic number.

It is an amenable number.

79898805 is an abundant number, since it is smaller than the sum of its proper divisors (83793867).

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

79898805 is a wasteful number, since it uses less digits than its factorization.

79898805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28207 (or 28198 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 54.

The square root of 79898805 is about 8938.6131474631. The cubic root of 79898805 is about 430.7051796651.

The spelling of 79898805 in words is "seventy-nine million, eight hundred ninety-eight thousand, eight hundred five".