985830 has 32 divisors (see below), whose sum is σ = 2506464. Its totient is φ = 247296.

The previous prime is 985819. The next prime is 985867. The reversal of 985830 is 38589.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a junction number, because it is equal to n+sod(n) for n = 985791 and 985800.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457 + ... + 1476.

It is an arithmetic number, because the mean of its divisors is an integer number (78327).

2⁹⁸⁵⁸³⁰ is an apocalyptic number.

985830 is an abundant number, since it is smaller than the sum of its proper divisors (1520634).

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

985830 is a wasteful number, since it uses less digits than its factorization.

985830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1960.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 985830 is about 992.8897219732. The cubic root of 985830 is about 99.5254179484.

The spelling of 985830 in words is "nine hundred eighty-five thousand, eight hundred thirty".