2578520 has 32 divisors (see below), whose sum is σ = 6631200. Its totient is φ = 883968.

The previous prime is 2578519. The next prime is 2578529. The reversal of 2578520 is 258752.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2578529) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4325 + ... + 4884.

It is an arithmetic number, because the mean of its divisors is an integer number (207225).

2^2578520 is an apocalyptic number.

2578520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2578520 is an abundant number, since it is smaller than the sum of its proper divisors (4052680).

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

2578520 is a wasteful number, since it uses less digits than its factorization.

2578520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9227 (or 9223 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 29.

The square root of 2578520 is about 1605.7770704553. Note that the first 3 decimals coincide. The cubic root of 2578520 is about 137.1271662769.

The spelling of 2578520 in words is "two million, five hundred seventy-eight thousand, five hundred twenty".