2564740 has 12 divisors (see below), whose sum is σ = 5385996. Its totient is φ = 1025888.

The previous prime is 2564719. The next prime is 2564741. The reversal of 2564740 is 474652.

2564740 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 665856 + 1898884 = 816^2 + 1378^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2564699 and 2564708.

It is not an unprimeable number, because it can be changed into a prime (2564741) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64099 + ... + 64138.

It is an arithmetic number, because the mean of its divisors is an integer number (448833).

2^2564740 is an apocalyptic number.

2564740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2564740 is an abundant number, since it is smaller than the sum of its proper divisors (2821256).

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

2564740 is a wasteful number, since it uses less digits than its factorization.

2564740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128246 (or 128244 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 2564740 is about 1601.4805649773. The cubic root of 2564740 is about 136.8824537409.

The spelling of 2564740 in words is "two million, five hundred sixty-four thousand, seven hundred forty".