764390 has 16 divisors (see below), whose sum is σ = 1501200. Its totient is φ = 277920.

The previous prime is 764381. The next prime is 764399. The reversal of 764390 is 93467.

It is an interprime number because it is at equal distance from previous prime (764381) and next prime (764399).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (764399) by changing a digit.

764390 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, 3365 + ... + 3584.

It is an arithmetic number, because the mean of its divisors is an integer number (93825).

2⁷⁶⁴³⁹⁰ is an apocalyptic number.

764390 is a deficient number, since it is larger than the sum of its proper divisors (736810).

764390 is a wasteful number, since it uses less digits than its factorization.

764390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6967.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 764390 is about 874.2940008944. The cubic root of 764390 is about 91.4334272440.

The spelling of 764390 in words is "seven hundred sixty-four thousand, three hundred ninety".