2578868 has 6 divisors (see below), whose sum is σ = 4513026. Its totient is φ = 1289432.

The previous prime is 2578861. The next prime is 2578879. The reversal of 2578868 is 8688752.

It can be written as a sum of positive squares in only one way, i.e., 2184484 + 394384 = 1478^2 + 628^2 .

It is a super-2 number, since 2×2578868² = 13301120322848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 322355 + ... + 322362.

It is an arithmetic number, because the mean of its divisors is an integer number (752171).

2^2578868 is an apocalyptic number.

It is an amenable number.

2578868 is a deficient number, since it is larger than the sum of its proper divisors (1934158).

2578868 is a wasteful number, since it uses less digits than its factorization.

2578868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644721 (or 644719 counting only the distinct ones).

The product of its digits is 215040, while the sum is 44.

The square root of 2578868 is about 1605.8854255519. The cubic root of 2578868 is about 137.1333349457.

The spelling of 2578868 in words is "two million, five hundred seventy-eight thousand, eight hundred sixty-eight".