9820440 has 160 divisors (see below), whose sum is σ = 37810080. Its totient is φ = 2239488.

The previous prime is 9820427. The next prime is 9820453. The reversal of 9820440 is 440289.

It is an interprime number because it is at equal distance from previous prime (9820427) and next prime (9820453).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 39 ways as a sum of consecutive naturals, for example, 22464 + ... + 22896.

It is an arithmetic number, because the mean of its divisors is an integer number (236313).

Almost surely, 2^9820440 is an apocalyptic number.

9820440 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9820440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18905040).

9820440 is an abundant number, since it is smaller than the sum of its proper divisors (27989640).

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

9820440 is a wasteful number, since it uses less digits than its factorization.

9820440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463 (or 450 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 9820440 is about 3133.7581272332. The cubic root of 9820440 is about 214.1461720073.

The spelling of 9820440 in words is "nine million, eight hundred twenty thousand, four hundred forty".