9867798 has 32 divisors (see below), whose sum is σ = 22468320. Its totient is φ = 3208320.

The previous prime is 9867797. The next prime is 9867799. The reversal of 9867798 is 8977689.

It is an interprime number because it is at equal distance from previous prime (9867797) and next prime (9867799).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9867797) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15 + ... + 4442.

It is an arithmetic number, because the mean of its divisors is an integer number (702135).

Almost surely, 2^9867798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9867798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11234160).

9867798 is an abundant number, since it is smaller than the sum of its proper divisors (12600522).

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

9867798 is a wasteful number, since it uses less digits than its factorization.

9867798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4509 (or 4503 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 9867798 is about 3141.3051427711. The cubic root of 9867798 is about 214.4898523245.

It can be divided in two parts, 98 and 67798, that added together give a triangular number (67896 = T₃₆₈).

The spelling of 9867798 in words is "nine million, eight hundred sixty-seven thousand, seven hundred ninety-eight".