8278987205 has 4 divisors (see below), whose sum is σ = 9934784652. Its totient is φ = 6623189760.

The previous prime is 8278987183. The next prime is 8278987217. The reversal of 8278987205 is 5027898728.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2852307649 + 5426679556 = 53407^2 + 73666^2 .

It is not a de Polignac number, because 8278987205 - 2¹⁸ = 8278725061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827898716 + ... + 827898725.

It is an arithmetic number, because the mean of its divisors is an integer number (2483696163).

Almost surely, 2^8278987205 is an apocalyptic number.

It is an amenable number.

8278987205 is a deficient number, since it is larger than the sum of its proper divisors (1655797447).

8278987205 is a wasteful number, since it uses less digits than its factorization.

8278987205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1655797446.

The product of its (nonzero) digits is 4515840, while the sum is 56.

The square root of 8278987205 is about 90988.9400147073. The cubic root of 8278987205 is about 2022.9837945686.

The spelling of 8278987205 in words is "eight billion, two hundred seventy-eight million, nine hundred eighty-seven thousand, two hundred five".