789649440 has 96 divisors (see below), whose sum is σ = 2496795840. Its totient is φ = 209777664.

The previous prime is 789649417. The next prime is 789649493. The reversal of 789649440 is 44946987.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 129991 + ... + 135929.

It is an arithmetic number, because the mean of its divisors is an integer number (26008290).

Almost surely, 2^789649440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 789649440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1248397920).

789649440 is an abundant number, since it is smaller than the sum of its proper divisors (1707146400).

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

789649440 is a wasteful number, since it uses less digits than its factorization.

789649440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6234 (or 6226 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The square root of 789649440 is about 28100.7017705964. The cubic root of 789649440 is about 924.2967881533.

The spelling of 789649440 in words is "seven hundred eighty-nine million, six hundred forty-nine thousand, four hundred forty".