278901 has 24 divisors (see below), whose sum is σ = 486720. Its totient is φ = 150336.

The previous prime is 278891. The next prime is 278903. The reversal of 278901 is 109872.

It is not a de Polignac number, because 278901 - 2¹³ = 270709 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1081 + ... + 1313.

It is an arithmetic number, because the mean of its divisors is an integer number (20280).

2²⁷⁸⁹⁰¹ is an apocalyptic number.

278901 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

278901 is a deficient number, since it is larger than the sum of its proper divisors (207819).

278901 is a wasteful number, since it uses less digits than its factorization.

278901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 262 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 278901 is about 528.1107838323. The cubic root of 278901 is about 65.3356210731.

The spelling of 278901 in words is "two hundred seventy-eight thousand, nine hundred one".