2478856 has 8 divisors (see below), whose sum is σ = 4647870. Its totient is φ = 1239424.

The previous prime is 2478809. The next prime is 2478877. The reversal of 2478856 is 6588742.

It can be written as a sum of positive squares in only one way, i.e., 2056356 + 422500 = 1434^2 + 650^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×2478856² = 12289454137472, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁰ + 4⁴ + 7⁶ + 8⁶ + 8⁷ + 5⁴ + 6 .

It is a zygodrome in base 3.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 154921 + ... + 154936.

2^2478856 is an apocalyptic number.

It is an amenable number.

2478856 is a deficient number, since it is larger than the sum of its proper divisors (2169014).

2478856 is a wasteful number, since it uses less digits than its factorization.

2478856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309863 (or 309859 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 2478856 is about 1574.4383125420. The cubic root of 2478856 is about 135.3371727309.

The spelling of 2478856 in words is "two million, four hundred seventy-eight thousand, eight hundred fifty-six".