764067636 has 144 divisors (see below), whose sum is σ = 2100204288. Its totient is φ = 233587200.

The previous prime is 764067617. The next prime is 764067643. The reversal of 764067636 is 636760467.

764067636 is a `hidden beast` number, since 7 + 6 + 4 + 0 + 6 + 7 + 636 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 764067591 and 764067600.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 2410150 + ... + 2410466.

It is an arithmetic number, because the mean of its divisors is an integer number (14584752).

Almost surely, 2^764067636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 764067636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1050102144).

764067636 is an abundant number, since it is smaller than the sum of its proper divisors (1336136652).

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

764067636 is a wasteful number, since it uses less digits than its factorization.

764067636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 45.

The square root of 764067636 is about 27641.7733873932. The cubic root of 764067636 is about 914.2057211776.

The spelling of 764067636 in words is "seven hundred sixty-four million, sixty-seven thousand, six hundred thirty-six".