2478256 has 20 divisors (see below), whose sum is σ = 5238504. Its totient is φ = 1126400.

The previous prime is 2478241. The next prime is 2478257. The reversal of 2478256 is 6528742.

It is a super-2 number, since 2×2478256² = 12283505603072, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2 + 4⁹ + 7⁶ + 8 + 2²¹ + 5 + 6⁴ .

It is not an unprimeable number, because it can be changed into a prime (2478257) 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, 6865 + ... + 7216.

2^2478256 is an apocalyptic number.

It is an amenable number.

2478256 is an abundant number, since it is smaller than the sum of its proper divisors (2760248).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2478256 is a wasteful number, since it uses less digits than its factorization.

2478256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14100 (or 14094 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 2478256 is about 1574.2477568668. The cubic root of 2478256 is about 135.3262525247.

It can be divided in two parts, 247825 and 6, that multiplied together give a triangular number (1486950 = T₁₇₂₄).

The spelling of 2478256 in words is "two million, four hundred seventy-eight thousand, two hundred fifty-six".