764721230 has 32 divisors (see below), whose sum is σ = 1694153664. Its totient is φ = 242021376.

The previous prime is 764721179. The next prime is 764721239. The reversal of 764721230 is 32127467.

764721230 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×764721230² = 1169597119225425800, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764721239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 419267 + ... + 421086.

It is an arithmetic number, because the mean of its divisors is an integer number (52942302).

Almost surely, 2^764721230 is an apocalyptic number.

764721230 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

764721230 is an abundant number, since it is smaller than the sum of its proper divisors (929432434).

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

764721230 is a wasteful number, since it uses less digits than its factorization.

764721230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 840380.

The product of its (nonzero) digits is 14112, while the sum is 32.

The square root of 764721230 is about 27653.5934373817. The cubic root of 764721230 is about 914.4663216146.

Adding to 764721230 its reverse (32127467), we get a palindrome (796848697).

The spelling of 764721230 in words is "seven hundred sixty-four million, seven hundred twenty-one thousand, two hundred thirty".