9720438 has 64 divisors (see below), whose sum is σ = 25213440. Its totient is φ = 2426112.

The previous prime is 9720437. The next prime is 9720439. The reversal of 9720438 is 8340279.

It is an interprime number because it is at equal distance from previous prime (9720437) and next prime (9720439).

It is a junction number, because it is equal to n+sod(n) for n = 9720399 and 9720408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720433) 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 31 ways as a sum of consecutive naturals, for example, 9906 + ... + 10842.

It is an arithmetic number, because the mean of its divisors is an integer number (393960).

Almost surely, 2^9720438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9720438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12606720).

9720438 is an abundant number, since it is smaller than the sum of its proper divisors (15493002).

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

9720438 is a wasteful number, since it uses less digits than its factorization.

9720438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 9720438 is about 3117.7616971154. The cubic root of 9720438 is about 213.4168038165.

The spelling of 9720438 in words is "nine million, seven hundred twenty thousand, four hundred thirty-eight".