709428 has 12 divisors (see below), whose sum is σ = 1655360. Its totient is φ = 236472.

The previous prime is 709421. The next prime is 709433. The reversal of 709428 is 824907.

709428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 709395 and 709404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (709421) by changing a digit.

709428 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29548 + ... + 29571.

2⁷⁰⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

709428 is an abundant number, since it is smaller than the sum of its proper divisors (945932).

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

709428 is a wasteful number, since it uses less digits than its factorization.

709428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59126 (or 59124 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 709428 is about 842.2754893739. The cubic root of 709428 is about 89.1872504182.

The spelling of 709428 in words is "seven hundred nine thousand, four hundred twenty-eight".