278953279 has 12 divisors (see below), whose sum is σ = 309792112. Its totient is φ = 250968960.

The previous prime is 278953273. The next prime is 278953313. The reversal of 278953279 is 972359872.

It is not a de Polignac number, because 278953279 - 2³ = 278953271 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 (278953271) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 147 + ... + 23620.

Almost surely, 2^278953279 is an apocalyptic number.

278953279 is a deficient number, since it is larger than the sum of its proper divisors (30838833).

278953279 is a wasteful number, since it uses less digits than its factorization.

278953279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23886 (or 23875 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The square root of 278953279 is about 16701.8944733824. The cubic root of 278953279 is about 653.3970312796.

The spelling of 278953279 in words is "two hundred seventy-eight million, nine hundred fifty-three thousand, two hundred seventy-nine".