279406 has 4 divisors (see below), whose sum is σ = 419112. Its totient is φ = 139702.

The previous prime is 279397. The next prime is 279407. The reversal of 279406 is 604972.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (279407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69850 + ... + 69853.

It is an arithmetic number, because the mean of its divisors is an integer number (104778).

2²⁷⁹⁴⁰⁶ is an apocalyptic number.

279406 is a deficient number, since it is larger than the sum of its proper divisors (139706).

279406 is a wasteful number, since it uses less digits than its factorization.

279406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139705.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 279406 is about 528.5886869769. The cubic root of 279406 is about 65.3750312276.

Subtracting from 279406 its sum of digits (28), we obtain a triangular number (279378 = T₇₄₇).

The spelling of 279406 in words is "two hundred seventy-nine thousand, four hundred six".