278888885 has 8 divisors (see below), whose sum is σ = 365090976. Its totient is φ = 202828240.

The previous prime is 278888879. The next prime is 278888891. The reversal of 278888885 is 588888872.

It is an interprime number because it is at equal distance from previous prime (278888879) and next prime (278888891).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 278888885 - 2¹² = 278884789 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 7 ways as a sum of consecutive naturals, for example, 2535299 + ... + 2535408.

It is an arithmetic number, because the mean of its divisors is an integer number (45636372).

Almost surely, 2^278888885 is an apocalyptic number.

It is an amenable number.

278888885 is a deficient number, since it is larger than the sum of its proper divisors (86202091).

278888885 is a wasteful number, since it uses less digits than its factorization.

278888885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070723.

The product of its digits is 18350080, while the sum is 62.

The square root of 278888885 is about 16699.9666167331. The cubic root of 278888885 is about 653.3467503550.

It can be divided in two parts, 2 and 78888885, that added together give a palindrome (78888887).

The spelling of 278888885 in words is "two hundred seventy-eight million, eight hundred eighty-eight thousand, eight hundred eighty-five".