764336520 has 128 divisors (see below), whose sum is σ = 2570745600. Its totient is φ = 201987072.

The previous prime is 764336519. The next prime is 764336569. The reversal of 764336520 is 25633467.

764336520 is a `hidden beast` number, since 7 + 643 + 3 + 6 + 5 + 2 + 0 = 666.

764336520 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118909 + ... + 125171.

It is an arithmetic number, because the mean of its divisors is an integer number (20083950).

Almost surely, 2^764336520 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 764336520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1285372800).

764336520 is an abundant number, since it is smaller than the sum of its proper divisors (1806409080).

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

764336520 is a wasteful number, since it uses less digits than its factorization.

764336520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6396 (or 6386 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 36.

The square root of 764336520 is about 27646.6366851377. The cubic root of 764336520 is about 914.3129483610.

Adding to 764336520 its reverse (25633467), we get a palindrome (789969987).

The spelling of 764336520 in words is "seven hundred sixty-four million, three hundred thirty-six thousand, five hundred twenty".