78279 has 8 divisors (see below), whose sum is σ = 105840. Its totient is φ = 51456.

The previous prime is 78277. The next prime is 78283. The reversal of 78279 is 97287.

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

It is not a de Polignac number, because 78279 - 2¹ = 78277 is a prime.

It is a super-2 number, since 2×78279² = 12255203682, which contains 22 as substring.

78279 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78277) 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, 157 + ... + 425.

It is an arithmetic number, because the mean of its divisors is an integer number (13230).

2⁷⁸²⁷⁹ is an apocalyptic number.

78279 is a deficient number, since it is larger than the sum of its proper divisors (27561).

78279 is a wasteful number, since it uses less digits than its factorization.

78279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369.

The product of its digits is 7056, while the sum is 33.

The square root of 78279 is about 279.7838451376. The cubic root of 78279 is about 42.7774694355. Note that the first 3 decimals are identical.

It can be divided in two parts, 782 and 79, that added together give a triangular number (861 = T₄₁).

The spelling of 78279 in words is "seventy-eight thousand, two hundred seventy-nine".