2278659 has 4 divisors (see below), whose sum is σ = 3038216. Its totient is φ = 1519104.

The previous prime is 2278649. The next prime is 2278681. The reversal of 2278659 is 9568722.

It is a happy number.

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

It is not a de Polignac number, because 2278659 - 2⁴ = 2278643 is a prime.

It is a d-powerful number, because it can be written as 2¹⁴ + 2²¹ + 7⁶ + 8² + 6⁶ + 5² + 9³ .

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2278649) 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, 379774 + ... + 379779.

It is an arithmetic number, because the mean of its divisors is an integer number (759554).

2^2278659 is an apocalyptic number.

2278659 is a deficient number, since it is larger than the sum of its proper divisors (759557).

2278659 is an equidigital number, since it uses as much as digits as its factorization.

2278659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 759556.

The product of its digits is 60480, while the sum is 39.

The square root of 2278659 is about 1509.5227722694. The cubic root of 2278659 is about 131.5910784071.

The spelling of 2278659 in words is "two million, two hundred seventy-eight thousand, six hundred fifty-nine".