709648128 has 180 divisors, whose sum is σ = 2418828720. Its totient is φ = 202715136.

The previous prime is 709648127. The next prime is 709648151. The reversal of 709648128 is 821846907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709648127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 142708 + ... + 147596.

Almost surely, 2^709648128 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 709648128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1209414360).

709648128 is an abundant number, since it is smaller than the sum of its proper divisors (1709180592).

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

709648128 is an equidigital number, since it uses as much as digits as its factorization.

709648128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4924 (or 4901 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 709648128 is about 26639.2216102498. The cubic root of 709648128 is about 891.9647408425.

The spelling of 709648128 in words is "seven hundred nine million, six hundred forty-eight thousand, one hundred twenty-eight".