278875263 has 4 divisors (see below), whose sum is σ = 371833688. Its totient is φ = 185916840.

The previous prime is 278875249. The next prime is 278875273. The reversal of 278875263 is 362578872.

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

It is not a de Polignac number, because 278875263 - 2⁵ = 278875231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278875243) 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 3 ways as a sum of consecutive naturals, for example, 46479208 + ... + 46479213.

It is an arithmetic number, because the mean of its divisors is an integer number (92958422).

Almost surely, 2^278875263 is an apocalyptic number.

278875263 is a deficient number, since it is larger than the sum of its proper divisors (92958425).

278875263 is an equidigital number, since it uses as much as digits as its factorization.

278875263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92958424.

The product of its digits is 1128960, while the sum is 48.

The square root of 278875263 is about 16699.5587666261. The cubic root of 278875263 is about 653.3361128636.

The spelling of 278875263 in words is "two hundred seventy-eight million, eight hundred seventy-five thousand, two hundred sixty-three".