2640530 has 8 divisors (see below), whose sum is σ = 4752972. Its totient is φ = 1056208.

The previous prime is 2640527. The next prime is 2640551. The reversal of 2640530 is 350462.

It can be written as a sum of positive squares in 2 ways, for example, as 2582449 + 58081 = 1607^2 + 241^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132017 + ... + 132036.

2^2640530 is an apocalyptic number.

2640530 is a deficient number, since it is larger than the sum of its proper divisors (2112442).

2640530 is a wasteful number, since it uses less digits than its factorization.

2640530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264060.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 2640530 is about 1624.9707689679. The cubic root of 2640530 is about 138.2177127801.

Adding to 2640530 its reverse (350462), we get a palindrome (2990992).

The spelling of 2640530 in words is "two million, six hundred forty thousand, five hundred thirty".