709457628 has 48 divisors (see below), whose sum is σ = 1813924224. Its totient is φ = 214031040.

The previous prime is 709457627. The next prime is 709457657. The reversal of 709457628 is 826754907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709457627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18126 + ... + 41802.

It is an arithmetic number, because the mean of its divisors is an integer number (37790088).

Almost surely, 2^709457628 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 709457628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (906962112).

709457628 is an abundant number, since it is smaller than the sum of its proper divisors (1104466596).

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

709457628 is a wasteful number, since it uses less digits than its factorization.

709457628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23922 (or 23920 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The square root of 709457628 is about 26635.6458153355. The cubic root of 709457628 is about 891.8849198330.

The spelling of 709457628 in words is "seven hundred nine million, four hundred fifty-seven thousand, six hundred twenty-eight".