2278423 has 16 divisors (see below), whose sum is σ = 2821120. Its totient is φ = 1796256.

The previous prime is 2278421. The next prime is 2278429. The reversal of 2278423 is 3248722.

It is not a de Polignac number, because 2278423 - 2¹ = 2278421 is a prime.

It is a super-2 number, since 2×2278423² = 10382422733858, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2278391 and 2278400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2278421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4690 + ... + 5152.

It is an arithmetic number, because the mean of its divisors is an integer number (176320).

2^2278423 is an apocalyptic number.

2278423 is a deficient number, since it is larger than the sum of its proper divisors (542697).

2278423 is a wasteful number, since it uses less digits than its factorization.

2278423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its digits is 5376, while the sum is 28.

The square root of 2278423 is about 1509.4445998446. Note that the first 3 decimals coincide. The cubic root of 2278423 is about 131.5865353014.

Subtracting 2278423 from its reverse (3248722), we obtain a cube (970299 = 99³).

It can be divided in two parts, 2278 and 423, that added together give a triangular number (2701 = T₇₃).

The spelling of 2278423 in words is "two million, two hundred seventy-eight thousand, four hundred twenty-three".