2566240 has 48 divisors (see below), whose sum is σ = 6220368. Its totient is φ = 999936.

The previous prime is 2566237. The next prime is 2566241. The reversal of 2566240 is 426652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2566241) 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, 6694 + ... + 7066.

It is an arithmetic number, because the mean of its divisors is an integer number (129591).

2^2566240 is an apocalyptic number.

2566240 is a gapful number since it is divisible by the number (20) 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 2566240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3110184).

2566240 is an abundant number, since it is smaller than the sum of its proper divisors (3654128).

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

2566240 is a wasteful number, since it uses less digits than its factorization.

2566240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431 (or 423 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 2566240 is about 1601.9488131648. The cubic root of 2566240 is about 136.9091339847.

The spelling of 2566240 in words is "two million, five hundred sixty-six thousand, two hundred forty".