278430 has 16 divisors (see below), whose sum is σ = 668304. Its totient is φ = 74240.

The previous prime is 278413. The next prime is 278437. The reversal of 278430 is 34872.

278430 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 278430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (278437) 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, 4611 + ... + 4670.

It is an arithmetic number, because the mean of its divisors is an integer number (41769).

2²⁷⁸⁴³⁰ is an apocalyptic number.

278430 is an abundant number, since it is smaller than the sum of its proper divisors (389874).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

278430 is a wasteful number, since it uses less digits than its factorization.

278430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9291.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 278430 is about 527.6646662417. The cubic root of 278430 is about 65.2988213763.

The spelling of 278430 in words is "two hundred seventy-eight thousand, four hundred thirty".