2478685 has 24 divisors (see below), whose sum is σ = 3476088. Its totient is φ = 1689600.

The previous prime is 2478677. The next prime is 2478691. The reversal of 2478685 is 5868742.

It can be written as a sum of positive squares in 4 ways, for example, as 793881 + 1684804 = 891^2 + 1298^2 .

It is not a de Polignac number, because 2478685 - 2³ = 2478677 is a prime.

It is a super-2 number, since 2×2478685² = 12287758658450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10165 + ... + 10405.

It is an arithmetic number, because the mean of its divisors is an integer number (144837).

2^2478685 is an apocalyptic number.

It is an amenable number.

2478685 is a deficient number, since it is larger than the sum of its proper divisors (997403).

2478685 is a wasteful number, since it uses less digits than its factorization.

2478685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285 (or 274 counting only the distinct ones).

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

The square root of 2478685 is about 1574.3840065245. The cubic root of 2478685 is about 135.3340606517.

The spelling of 2478685 in words is "two million, four hundred seventy-eight thousand, six hundred eighty-five".