709479144 has 288 divisors, whose sum is σ = 2270661120. Its totient is φ = 199584000.

The previous prime is 709479143. The next prime is 709479163. The reversal of 709479144 is 441974907.

It is a self number, because there is not a number n which added to its sum of digits gives 709479144.

It is not an unprimeable number, because it can be changed into a prime (709479143) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9992629 + ... + 9992699.

It is an arithmetic number, because the mean of its divisors is an integer number (7884240).

Almost surely, 2^709479144 is an apocalyptic number.

709479144 is a gapful number since it is divisible by the number (74) 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 709479144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1135330560).

709479144 is an abundant number, since it is smaller than the sum of its proper divisors (1561181976).

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

709479144 is a wasteful number, since it uses less digits than its factorization.

709479144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 45.

The square root of 709479144 is about 26636.0497071169. The cubic root of 709479144 is about 891.8939359232.

The spelling of 709479144 in words is "seven hundred nine million, four hundred seventy-nine thousand, one hundred forty-four".