766440 has 48 divisors (see below), whose sum is σ = 2492100. Its totient is φ = 204288.

The previous prime is 766439. The next prime is 766453. The reversal of 766440 is 44667.

It can be written as a sum of positive squares in 2 ways, for example, as 736164 + 30276 = 858^2 + 174^2 .

It is a nialpdrome in base 10.

It is an unprimeable number.

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, 705 + ... + 1424.

2⁷⁶⁶⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

766440 is an abundant number, since it is smaller than the sum of its proper divisors (1725660).

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

766440 is a wasteful number, since it uses less digits than its factorization.

766440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146 (or 2139 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 27.

The square root of 766440 is about 875.4655904146. The cubic root of 766440 is about 91.5150920192.

The spelling of 766440 in words is "seven hundred sixty-six thousand, four hundred forty".