2578236 has 12 divisors (see below), whose sum is σ = 6015912. Its totient is φ = 859408.

The previous prime is 2578217. The next prime is 2578249. The reversal of 2578236 is 6328752.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 2578197 and 2578206.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107415 + ... + 107438.

It is an arithmetic number, because the mean of its divisors is an integer number (501326).

2^2578236 is an apocalyptic number.

It is an amenable number.

2578236 is an abundant number, since it is smaller than the sum of its proper divisors (3437676).

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

2578236 is a wasteful number, since it uses less digits than its factorization.

2578236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214860 (or 214858 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 2578236 is about 1605.6886373142. The cubic root of 2578236 is about 137.1221316647.

The spelling of 2578236 in words is "two million, five hundred seventy-eight thousand, two hundred thirty-six".