764530 has 16 divisors (see below), whose sum is σ = 1482264. Its totient is φ = 282240.

The previous prime is 764521. The next prime is 764539. The reversal of 764530 is 35467.

It is an interprime number because it is at equal distance from previous prime (764521) and next prime (764539).

It can be written as a sum of positive squares in 4 ways, for example, as 603729 + 160801 = 777^2 + 401^2 .

It is a super-2 number, since 2×764530² = 1169012241800, which contains 22 as substring.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 764495 and 764504.

It is not an unprimeable number, because it can be changed into a prime (764539) by changing a digit.

764530 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2811 + ... + 3070.

2⁷⁶⁴⁵³⁰ is an apocalyptic number.

764530 is a deficient number, since it is larger than the sum of its proper divisors (717734).

764530 is a wasteful number, since it uses less digits than its factorization.

764530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5901.

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

The square root of 764530 is about 874.3740618294. The cubic root of 764530 is about 91.4390089925.

Adding to 764530 its reverse (35467), we get a palindrome (799997).

The spelling of 764530 in words is "seven hundred sixty-four thousand, five hundred thirty".