9795978 has 40 divisors (see below), whose sum is σ = 23247972. Its totient is φ = 3072384.

The previous prime is 9795977. The next prime is 9795979. The reversal of 9795978 is 8795979.

9795978 is nontrivially palindromic in base 11.

9795978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (9795977) and next prime (9795979).

It can be written as a sum of positive squares in 2 ways, for example, as 9753129 + 42849 = 3123^2 + 207^2 .

It is a super-2 number, since 2×9795978² = 191922369952968, which contains 22 as substring.

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 (9795977) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 976 + ... + 4532.

Almost surely, 2^9795978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9795978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11623986).

9795978 is an abundant number, since it is smaller than the sum of its proper divisors (13451994).

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

9795978 is a wasteful number, since it uses less digits than its factorization.

9795978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3588 (or 3579 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 54.

The square root of 9795978 is about 3129.8527121895. The cubic root of 9795978 is about 213.9682166674.

Subtracting from 9795978 its reverse (8795979), we obtain a palindrome (999999).

The spelling of 9795978 in words is "nine million, seven hundred ninety-five thousand, nine hundred seventy-eight".