• 764 can be written using four 4's:

764 has 6 divisors (see below), whose sum is σ = 1344. Its totient is φ = 380.

The previous prime is 761. The next prime is 769. The reversal of 764 is 467.

764 = 6^{2} + 7^{2} + ... + 13^{2}.

It is a plaindrome in base 13 and base 15.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92 + ... + 99.

It is an arithmetic number, because the mean of its divisors is an integer number (224).

It is an amenable number.

764 is a deficient number, since it is larger than the sum of its proper divisors (580).

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

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

The sum of its prime factors is 195 (or 193 counting only the distinct ones).

The product of its digits is 168, while the sum is 17.

The square root of 764 is about 27.6405499222. The cubic root of 764 is about 9.1417874493.

Subtracting from 764 its sum of digits (17), we obtain a palindrome (747).

The spelling of 764 in words is "seven hundred sixty-four", and thus it is an aban number.

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