278235 has 24 divisors (see below), whose sum is σ = 502320. Its totient is φ = 147744.

The previous prime is 278233. The next prime is 278237. The reversal of 278235 is 532872.

It is an interprime number because it is at equal distance from previous prime (278233) and next prime (278237).

It is not a de Polignac number, because 278235 - 2¹ = 278233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 2⁵ + 7³ + 2¹⁸ + 8² + 3³ + 5⁶ .

It is a junction number, because it is equal to n+sod(n) for n = 278199 and 278208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278233) 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, 1101 + ... + 1329.

It is an arithmetic number, because the mean of its divisors is an integer number (20930).

2²⁷⁸²³⁵ is an apocalyptic number.

278235 is a deficient number, since it is larger than the sum of its proper divisors (224085).

278235 is an equidigital number, since it uses as much as digits as its factorization.

278235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249 (or 237 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 278235 is about 527.4798574353. The cubic root of 278235 is about 65.2835736852.

The spelling of 278235 in words is "two hundred seventy-eight thousand, two hundred thirty-five".