789643540 has 96 divisors (see below), whose sum is σ = 2035321344. Its totient is φ = 251166720.

The previous prime is 789643537. The next prime is 789643549. The reversal of 789643540 is 45346987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (789643549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 166644 + ... + 171316.

It is an arithmetic number, because the mean of its divisors is an integer number (21201264).

Almost surely, 2^789643540 is an apocalyptic number.

789643540 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 789643540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1017660672).

789643540 is an abundant number, since it is smaller than the sum of its proper divisors (1245677804).

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

789643540 is a wasteful number, since it uses less digits than its factorization.

789643540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777 (or 4775 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 789643540 is about 28100.5967908157. The cubic root of 789643540 is about 924.2944861341.

The spelling of 789643540 in words is "seven hundred eighty-nine million, six hundred forty-three thousand, five hundred forty".