2478864 has 40 divisors (see below), whose sum is σ = 6558112. Its totient is φ = 806400.

The previous prime is 2478809. The next prime is 2478877. The reversal of 2478864 is 4688742.

2478864 is nontrivially palindromic in base 7.

It is a super-2 number, since 2×2478864² = 12289533460992, which contains 22 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1464 + ... + 2664.

2^2478864 is an apocalyptic number.

2478864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2478864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3279056).

2478864 is an abundant number, since it is smaller than the sum of its proper divisors (4079248).

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

2478864 is a wasteful number, since it uses less digits than its factorization.

2478864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255 (or 1249 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 2478864 is about 1574.4408531285. The cubic root of 2478864 is about 135.3373183217.

The spelling of 2478864 in words is "two million, four hundred seventy-eight thousand, eight hundred sixty-four".