709776 has 80 divisors (see below), whose sum is σ = 2142720. Its totient is φ = 224640.

The previous prime is 709769. The next prime is 709777. The reversal of 709776 is 677907.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 709776.

It is not an unprimeable number, because it can be changed into a prime (709777) 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, 13366 + ... + 13418.

It is an arithmetic number, because the mean of its divisors is an integer number (26784).

2⁷⁰⁹⁷⁷⁶ 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 709776, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1071360).

709776 is an abundant number, since it is smaller than the sum of its proper divisors (1432944).

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

709776 is a wasteful number, since it uses less digits than its factorization.

709776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 89 counting only the distinct ones).

The product of its (nonzero) digits is 18522, while the sum is 36.

The square root of 709776 is about 842.4820472865. The cubic root of 709776 is about 89.2018312212.

It can be divided in two parts, 709 and 776, that added together give a triangular number (1485 = T₅₄).

The spelling of 709776 in words is "seven hundred nine thousand, seven hundred seventy-six".