709640568 has 256 divisors, whose sum is σ = 2462208000. Its totient is φ = 184384512.

The previous prime is 709640531. The next prime is 709640573. The reversal of 709640568 is 865046907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1552596 + ... + 1553052.

It is an arithmetic number, because the mean of its divisors is an integer number (9618000).

Almost surely, 2^709640568 is an apocalyptic number.

709640568 is a gapful number since it is divisible by the number (78) 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 709640568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1231104000).

709640568 is an abundant number, since it is smaller than the sum of its proper divisors (1752567432).

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

709640568 is a wasteful number, since it uses less digits than its factorization.

709640568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 571 (or 561 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 709640568 is about 26639.0797138340. The cubic root of 709640568 is about 891.9615734149.

The spelling of 709640568 in words is "seven hundred nine million, six hundred forty thousand, five hundred sixty-eight".