2278623 has 8 divisors (see below), whose sum is σ = 3045168. Its totient is φ = 1515584.

The previous prime is 2278553. The next prime is 2278631. The reversal of 2278623 is 3268722.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2278623 is a prime.

It is a super-2 number, since 2×2278623² = 10384245552258, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278643) 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, 1915 + ... + 2867.

It is an arithmetic number, because the mean of its divisors is an integer number (380646).

2^2278623 is an apocalyptic number.

2278623 is a deficient number, since it is larger than the sum of its proper divisors (766545).

2278623 is an equidigital number, since it uses as much as digits as its factorization.

2278623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753.

The product of its digits is 8064, while the sum is 30.

The square root of 2278623 is about 1509.5108479239. The cubic root of 2278623 is about 131.5903854113.

Subtracting 2278623 from its reverse (3268722), we obtain a palindrome (990099).

The spelling of 2278623 in words is "two million, two hundred seventy-eight thousand, six hundred twenty-three".