2278279 has 4 divisors (see below), whose sum is σ = 2285784. Its totient is φ = 2270776.

The previous prime is 2278277. The next prime is 2278291. The reversal of 2278279 is 9728722.

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

It is a cyclic number.

It is not a de Polignac number, because 2278279 - 2¹ = 2278277 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 2¹⁷ + 7³ + 8⁵ + 2²¹ + 7⁵ + 9 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3277 + ... + 3910.

It is an arithmetic number, because the mean of its divisors is an integer number (571446).

2^2278279 is an apocalyptic number.

2278279 is a deficient number, since it is larger than the sum of its proper divisors (7505).

2278279 is an equidigital number, since it uses as much as digits as its factorization.

2278279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7504.

The product of its digits is 28224, while the sum is 37.

The square root of 2278279 is about 1509.3968994271. The cubic root of 2278279 is about 131.5837630827.

The spelling of 2278279 in words is "two million, two hundred seventy-eight thousand, two hundred seventy-nine".