578787640 has 64 divisors (see below), whose sum is σ = 1382054400. Its totient is φ = 217675392.

The previous prime is 578787637. The next prime is 578787659. The reversal of 578787640 is 46787875.

It is a congruent number.

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, 48949 + ... + 59611.

It is an arithmetic number, because the mean of its divisors is an integer number (21594600).

Almost surely, 2^578787640 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 578787640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (691027200).

578787640 is an abundant number, since it is smaller than the sum of its proper divisors (803266760).

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

578787640 is a wasteful number, since it uses less digits than its factorization.

578787640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10756 (or 10752 counting only the distinct ones).

The product of its (nonzero) digits is 2634240, while the sum is 52.

The square root of 578787640 is about 24058.0057361370. The cubic root of 578787640 is about 833.3736208078.

The spelling of 578787640 in words is "five hundred seventy-eight million, seven hundred eighty-seven thousand, six hundred forty".