9827990 has 16 divisors (see below), whose sum is σ = 17934048. Its totient is φ = 3877056.

The previous prime is 9827981. The next prime is 9827999. The reversal of 9827990 is 997289.

It is an interprime number because it is at equal distance from previous prime (9827981) and next prime (9827999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9827999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6002 + ... + 7461.

It is an arithmetic number, because the mean of its divisors is an integer number (1120878).

Almost surely, 2^9827990 is an apocalyptic number.

9827990 is a deficient number, since it is larger than the sum of its proper divisors (8106058).

9827990 is a wasteful number, since it uses less digits than its factorization.

9827990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13543.

The product of its (nonzero) digits is 81648, while the sum is 44.

The square root of 9827990 is about 3134.9625197122. The cubic root of 9827990 is about 214.2010368077.

The spelling of 9827990 in words is "nine million, eight hundred twenty-seven thousand, nine hundred ninety".