7640530 has 8 divisors (see below), whose sum is σ = 13752972. Its totient is φ = 3056208.

The previous prime is 7640519. The next prime is 7640579. The reversal of 7640530 is 350467.

It can be written as a sum of positive squares in 2 ways, for example, as 7513081 + 127449 = 2741^2 + 357^2 .

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7640495 and 7640504.

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, 382017 + ... + 382036.

Almost surely, 2^7640530 is an apocalyptic number.

7640530 is a deficient number, since it is larger than the sum of its proper divisors (6112442).

7640530 is a wasteful number, since it uses less digits than its factorization.

7640530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764060.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 7640530 is about 2764.1508641896. The cubic root of 7640530 is about 196.9583943332.

Adding to 7640530 its reverse (350467), we get a palindrome (7990997).

The spelling of 7640530 in words is "seven million, six hundred forty thousand, five hundred thirty".