978008805 has 24 divisors (see below), whose sum is σ = 1712699352. Its totient is φ = 516225024.

The previous prime is 978008803. The next prime is 978008851. The reversal of 978008805 is 508800879.

It can be written as a sum of positive squares in 4 ways, for example, as 270076356 + 707932449 = 16434^2 + 26607^2 .

It is not a de Polignac number, because 978008805 - 2¹ = 978008803 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 (978008803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 107664 + ... + 116393.

It is an arithmetic number, because the mean of its divisors is an integer number (71362473).

Almost surely, 2^978008805 is an apocalyptic number.

It is an amenable number.

978008805 is a deficient number, since it is larger than the sum of its proper divisors (734690547).

978008805 is a wasteful number, since it uses less digits than its factorization.

978008805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224165 (or 224162 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 978008805 is about 31273.1323183336. The cubic root of 978008805 is about 992.6152006492.

The spelling of 978008805 in words is "nine hundred seventy-eight million, eight thousand, eight hundred five".