8278399 has 4 divisors (see below), whose sum is σ = 8284536. Its totient is φ = 8272264.

The previous prime is 8278393. The next prime is 8278411. The reversal of 8278399 is 9938728.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 8278399 - 2¹¹ = 8276351 is a prime.

It is a Duffinian number.

8278399 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8278393) 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, 64 + ... + 4069.

It is an arithmetic number, because the mean of its divisors is an integer number (2071134).

Almost surely, 2^8278399 is an apocalyptic number.

8278399 is a deficient number, since it is larger than the sum of its proper divisors (6137).

8278399 is a wasteful number, since it uses less digits than its factorization.

8278399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6136.

The product of its digits is 217728, while the sum is 46.

The square root of 8278399 is about 2877.2207075579. The cubic root of 8278399 is about 202.2935883822.

The spelling of 8278399 in words is "eight million, two hundred seventy-eight thousand, three hundred ninety-nine".