764040 has 32 divisors (see below), whose sum is σ = 2292480. Its totient is φ = 203712.

The previous prime is 764021. The next prime is 764041. The reversal of 764040 is 40467.

It is a nialpdrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 763998 and 764016.

It is not an unprimeable number, because it can be changed into a prime (764041) by changing a digit.

764040 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, 3064 + ... + 3303.

It is an arithmetic number, because the mean of its divisors is an integer number (71640).

2⁷⁶⁴⁰⁴⁰ is an apocalyptic number.

It is an amenable number.

764040 is an abundant number, since it is smaller than the sum of its proper divisors (1528440).

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

764040 is a wasteful number, since it uses less digits than its factorization.

764040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6381 (or 6377 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 21.

The square root of 764040 is about 874.0938164751. The cubic root of 764040 is about 91.4194698901.

The spelling of 764040 in words is "seven hundred sixty-four thousand, forty".