764680 has 32 divisors (see below), whose sum is σ = 1967040. Its totient is φ = 262080.

The previous prime is 764657. The next prime is 764683. The reversal of 764680 is 86467.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (764683) by changing a digit.

764680 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1086 + ... + 1645.

It is an arithmetic number, because the mean of its divisors is an integer number (61470).

2⁷⁶⁴⁶⁸⁰ is an apocalyptic number.

764680 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

764680 is an abundant number, since it is smaller than the sum of its proper divisors (1202360).

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

764680 is a wasteful number, since it uses less digits than its factorization.

764680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2745 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 764680 is about 874.4598332685. The cubic root of 764680 is about 91.4449886813. Note that the first 3 decimals are identical.

It can be divided in two parts, 764 and 680, that added together give a square (1444 = 38²).

The spelling of 764680 in words is "seven hundred sixty-four thousand, six hundred eighty".