278412 has 12 divisors (see below), whose sum is σ = 649656. Its totient is φ = 92800.

The previous prime is 278393. The next prime is 278413. The reversal of 278412 is 214872.

278412 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (278413) by changing a digit.

278412 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11589 + ... + 11612.

It is an arithmetic number, because the mean of its divisors is an integer number (54138).

2²⁷⁸⁴¹² is an apocalyptic number.

It is an amenable number.

278412 is an abundant number, since it is smaller than the sum of its proper divisors (371244).

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

278412 is a wasteful number, since it uses less digits than its factorization.

278412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23208 (or 23206 counting only the distinct ones).

The product of its digits is 896, while the sum is 24.

The square root of 278412 is about 527.6476096790. The cubic root of 278412 is about 65.2974141955.

The spelling of 278412 in words is "two hundred seventy-eight thousand, four hundred twelve".