278851 has 8 divisors (see below), whose sum is σ = 302400. Its totient is φ = 256128.

The previous prime is 278849. The next prime is 278867. The reversal of 278851 is 158872.

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

It is a cyclic number.

It is not a de Polignac number, because 278851 - 2¹ = 278849 is a prime.

It is a d-powerful number, because it can be written as 2¹⁰ + 7² + 8 + 8⁶ + 5⁶ + 1 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (278801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 625 + ... + 973.

It is an arithmetic number, because the mean of its divisors is an integer number (37800).

2²⁷⁸⁸⁵¹ is an apocalyptic number.

278851 is a deficient number, since it is larger than the sum of its proper divisors (23549).

278851 is a wasteful number, since it uses less digits than its factorization.

278851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413.

The product of its digits is 4480, while the sum is 31.

The square root of 278851 is about 528.0634431581. The cubic root of 278851 is about 65.3317164901.

The spelling of 278851 in words is "two hundred seventy-eight thousand, eight hundred fifty-one".