764731222 has 8 divisors (see below), whose sum is σ = 1147451400. Its totient is φ = 382247424.

The previous prime is 764731217. The next prime is 764731267. The reversal of 764731222 is 222137467.

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

It is a super-2 number, since 2×764731222² = 1169627683803226568, which contains 22 as substring.

It is a congruent number.

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, 50772 + ... + 64087.

It is an arithmetic number, because the mean of its divisors is an integer number (143431425).

Almost surely, 2^764731222 is an apocalyptic number.

764731222 is a deficient number, since it is larger than the sum of its proper divisors (382720178).

764731222 is a wasteful number, since it uses less digits than its factorization.

764731222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118190.

The product of its digits is 28224, while the sum is 34.

The square root of 764731222 is about 27653.7741004732. The cubic root of 764731222 is about 914.4703044637.

Adding to 764731222 its reverse (222137467), we get a palindrome (986868689).

The spelling of 764731222 in words is "seven hundred sixty-four million, seven hundred thirty-one thousand, two hundred twenty-two".