9855828 has 18 divisors (see below), whose sum is σ = 24913434. Its totient is φ = 3285264.

The previous prime is 9855823. The next prime is 9855863. The reversal of 9855828 is 8285589.

9855828 is a `hidden beast` number, since 98 + 558 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7551504 + 2304324 = 2748^2 + 1518^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9855821) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 136851 + ... + 136922.

Almost surely, 2^9855828 is an apocalyptic number.

It is an amenable number.

9855828 is an abundant number, since it is smaller than the sum of its proper divisors (15057606).

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

9855828 is a wasteful number, since it uses less digits than its factorization.

9855828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273783 (or 273778 counting only the distinct ones).

The product of its digits is 230400, while the sum is 45.

The square root of 9855828 is about 3139.3993055997. The cubic root of 9855828 is about 214.4030892200.

The spelling of 9855828 in words is "nine million, eight hundred fifty-five thousand, eight hundred twenty-eight".