764487 has 12 divisors (see below), whose sum is σ = 1112904. Its totient is φ = 505680.

The previous prime is 764471. The next prime is 764501. The reversal of 764487 is 784467.

It is a happy number.

764487 is a `hidden beast` number, since 7 + 644 + 8 + 7 = 666.

It is not a de Polignac number, because 764487 - 2⁴ = 764471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1312 + ... + 1802.

It is an arithmetic number, because the mean of its divisors is an integer number (92742).

2⁷⁶⁴⁴⁸⁷ is an apocalyptic number.

764487 is a deficient number, since it is larger than the sum of its proper divisors (348417).

764487 is a wasteful number, since it uses less digits than its factorization.

764487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670 (or 667 counting only the distinct ones).

The product of its digits is 37632, while the sum is 36.

The square root of 764487 is about 874.3494724651. The cubic root of 764487 is about 91.4372946708.

The spelling of 764487 in words is "seven hundred sixty-four thousand, four hundred eighty-seven".