779440 has 20 divisors (see below), whose sum is σ = 1812384. Its totient is φ = 311744.

The previous prime is 779413. The next prime is 779477. The reversal of 779440 is 44977.

779440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4792 + ... + 4951.

2⁷⁷⁹⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

779440 is an abundant number, since it is smaller than the sum of its proper divisors (1032944).

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

779440 is a wasteful number, since it uses less digits than its factorization.

779440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9756 (or 9750 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 779440 is about 882.8589921386. The cubic root of 779440 is about 92.0296060985.

The spelling of 779440 in words is "seven hundred seventy-nine thousand, four hundred forty".