985428 has 36 divisors (see below), whose sum is σ = 2574208. Its totient is φ = 317520.

The previous prime is 985417. The next prime is 985433. The reversal of 985428 is 824589.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 985392 and 985401.

It is a congruent number.

It is an unprimeable number.

985428 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 11 ways as a sum of consecutive naturals, for example, 675 + ... + 1557.

2⁹⁸⁵⁴²⁸ 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 985428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287104).

985428 is an abundant number, since it is smaller than the sum of its proper divisors (1588780).

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

985428 is a wasteful number, since it uses less digits than its factorization.

985428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 924 (or 919 counting only the distinct ones).

The product of its digits is 23040, while the sum is 36.

The square root of 985428 is about 992.6872619310. The cubic root of 985428 is about 99.5118880100.

The spelling of 985428 in words is "nine hundred eighty-five thousand, four hundred twenty-eight".