9990834 has 16 divisors (see below), whose sum is σ = 22836288. Its totient is φ = 2854512.

The previous prime is 9990833. The next prime is 9990847. The reversal of 9990834 is 4380999.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 237877 = 9990834 / (9 + 9 + 9 + 0 + 8 + 3 + 4).

It is not an unprimeable number, because it can be changed into a prime (9990833) 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 7 ways as a sum of consecutive naturals, for example, 118897 + ... + 118980.

It is an arithmetic number, because the mean of its divisors is an integer number (1427268).

Almost surely, 2^9990834 is an apocalyptic number.

9990834 is an abundant number, since it is smaller than the sum of its proper divisors (12845454).

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

9990834 is a wasteful number, since it uses less digits than its factorization.

9990834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237889.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 9990834 is about 3160.8280560638. The cubic root of 9990834 is about 215.3776237199.

The spelling of 9990834 in words is "nine million, nine hundred ninety thousand, eight hundred thirty-four".