8278889 has 4 divisors (see below), whose sum is σ = 8714640. Its totient is φ = 7843140.

The previous prime is 8278883. The next prime is 8278931. The reversal of 8278889 is 9888728.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8278889 - 2¹² = 8274793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8278883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 217847 + ... + 217884.

It is an arithmetic number, because the mean of its divisors is an integer number (2178660).

Almost surely, 2^8278889 is an apocalyptic number.

It is an amenable number.

8278889 is a deficient number, since it is larger than the sum of its proper divisors (435751).

8278889 is a wasteful number, since it uses less digits than its factorization.

8278889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435750.

The product of its digits is 516096, while the sum is 50.

The square root of 8278889 is about 2877.3058579164. The cubic root of 8278889 is about 202.2975795687.

The spelling of 8278889 in words is "eight million, two hundred seventy-eight thousand, eight hundred eighty-nine".