764436 has 12 divisors (see below), whose sum is σ = 1783712. Its totient is φ = 254808.

The previous prime is 764431. The next prime is 764447. The reversal of 764436 is 634467.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 764436.

It is not an unprimeable number, because it can be changed into a prime (764431) by changing a digit.

764436 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 3 ways as a sum of consecutive naturals, for example, 31840 + ... + 31863.

2⁷⁶⁴⁴³⁶ is an apocalyptic number.

It is an amenable number.

764436 is an abundant number, since it is smaller than the sum of its proper divisors (1019276).

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

764436 is a wasteful number, since it uses less digits than its factorization.

764436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63710 (or 63708 counting only the distinct ones).

The product of its digits is 12096, while the sum is 30.

The square root of 764436 is about 874.3203074389. The cubic root of 764436 is about 91.4352613222.

Adding to 764436 its sum of digits (30), we get a triangular number (764466 = T₁₂₃₆).

The spelling of 764436 in words is "seven hundred sixty-four thousand, four hundred thirty-six".