2478289 has 4 divisors (see below), whose sum is σ = 2703600. Its totient is φ = 2252980.

The previous prime is 2478271. The next prime is 2478293. The reversal of 2478289 is 9828742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2478289 - 2⁵ = 2478257 is a prime.

It is a super-2 number, since 2×2478289² = 12283832735042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2478239) 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, 112639 + ... + 112660.

It is an arithmetic number, because the mean of its divisors is an integer number (675900).

2^2478289 is an apocalyptic number.

It is an amenable number.

2478289 is a deficient number, since it is larger than the sum of its proper divisors (225311).

2478289 is a wasteful number, since it uses less digits than its factorization.

2478289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225310.

The product of its digits is 64512, while the sum is 40.

The square root of 2478289 is about 1574.2582380283. The cubic root of 2478289 is about 135.3268531818.

The spelling of 2478289 in words is "two million, four hundred seventy-eight thousand, two hundred eighty-nine".