706428 has 48 divisors (see below), whose sum is σ = 1899520. Its totient is φ = 226800.

The previous prime is 706427. The next prime is 706463. The reversal of 706428 is 824607.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 706428.

It is not an unprimeable number, because it can be changed into a prime (706427) 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, 3243 + ... + 3453.

2⁷⁰⁶⁴²⁸ 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 706428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (949760).

706428 is an abundant number, since it is smaller than the sum of its proper divisors (1193092).

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

706428 is a wasteful number, since it uses less digits than its factorization.

706428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 706428 is about 840.4927126394. The cubic root of 706428 is about 89.0613556640.

The spelling of 706428 in words is "seven hundred six thousand, four hundred twenty-eight".