764856222 has 64 divisors (see below), whose sum is σ = 1692768000. Its totient is φ = 228904704.

The previous prime is 764856203. The next prime is 764856227. The reversal of 764856222 is 222658467.

It is a super-3 number, since 3×764856222³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764856227) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1532529 + ... + 1533027.

It is an arithmetic number, because the mean of its divisors is an integer number (26449500).

Almost surely, 2^764856222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 764856222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (846384000).

764856222 is an abundant number, since it is smaller than the sum of its proper divisors (927911778).

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

764856222 is a wasteful number, since it uses less digits than its factorization.

764856222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017.

The product of its digits is 322560, while the sum is 42.

The square root of 764856222 is about 27656.0340974623. The cubic root of 764856222 is about 914.5201270057.

The spelling of 764856222 in words is "seven hundred sixty-four million, eight hundred fifty-six thousand, two hundred twenty-two".