780740 has 24 divisors (see below), whose sum is σ = 1659840. Its totient is φ = 308448.

The previous prime is 780733. The next prime is 780799. The reversal of 780740 is 47087.

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 7 ways as a sum of consecutive naturals, for example, 1871 + ... + 2249.

It is an arithmetic number, because the mean of its divisors is an integer number (69160).

2⁷⁸⁰⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

780740 is an abundant number, since it is smaller than the sum of its proper divisors (879100).

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

780740 is a wasteful number, since it uses less digits than its factorization.

780740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 780740 is about 883.5949298180. The cubic root of 780740 is about 92.0807419721.

The spelling of 780740 in words is "seven hundred eighty thousand, seven hundred forty".