789440 has 28 divisors (see below), whose sum is σ = 1880616. Its totient is φ = 315648.

The previous prime is 789419. The next prime is 789443. The reversal of 789440 is 44987.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 789397 and 789406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (789443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 914 + ... + 1553.

2⁷⁸⁹⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

789440 is an abundant number, since it is smaller than the sum of its proper divisors (1091176).

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

789440 is a wasteful number, since it uses less digits than its factorization.

789440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484 (or 2474 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 789440 is about 888.5043612724. The cubic root of 789440 is about 92.4215063349.

The spelling of 789440 in words is "seven hundred eighty-nine thousand, four hundred forty".