220000764 has 12 divisors (see below), whose sum is σ = 513335144. Its totient is φ = 73333584.

The previous prime is 220000763. The next prime is 220000799. The reversal of 220000764 is 467000022.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 220000764.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220000763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9166687 + ... + 9166710.

Almost surely, 2^220000764 is an apocalyptic number.

It is an amenable number.

220000764 is an abundant number, since it is smaller than the sum of its proper divisors (293334380).

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

220000764 is a wasteful number, since it uses less digits than its factorization.

220000764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18333404 (or 18333402 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 220000764 is about 14832.4227286037. The cubic root of 220000764 is about 603.6817724855.

Adding to 220000764 its reverse (467000022), we get a palindrome (687000786).

The spelling of 220000764 in words is "two hundred twenty million, seven hundred sixty-four", and thus it is an aban number.