278998 has 8 divisors (see below), whose sum is σ = 421200. Its totient is φ = 138600.

The previous prime is 278981. The next prime is 279001. The reversal of 278998 is 899872.

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

It is a plaindrome in base 12.

It is a congruent number.

It is an unprimeable number.

278998 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, 48 + ... + 748.

It is an arithmetic number, because the mean of its divisors is an integer number (52650).

2²⁷⁸⁹⁹⁸ is an apocalyptic number.

278998 is a deficient number, since it is larger than the sum of its proper divisors (142202).

278998 is a wasteful number, since it uses less digits than its factorization.

278998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 902.

The product of its digits is 72576, while the sum is 43.

The square root of 278998 is about 528.2026126403. The cubic root of 278998 is about 65.3431946335.

It can be divided in two parts, 27 and 8998, that added together give a square (9025 = 95²).

The spelling of 278998 in words is "two hundred seventy-eight thousand, nine hundred ninety-eight".