9978427284 has 24 divisors (see below), whose sum is σ = 26609139648. Its totient is φ = 2850979200.

The previous prime is 9978427273. The next prime is 9978427297. The reversal of 9978427284 is 4827248799.

It is a super-2 number, since 2×9978427284² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59395317 + ... + 59395484.

It is an arithmetic number, because the mean of its divisors is an integer number (1108714152).

Almost surely, 2^9978427284 is an apocalyptic number.

It is an amenable number.

9978427284 is an abundant number, since it is smaller than the sum of its proper divisors (16630712364).

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

9978427284 is a wasteful number, since it uses less digits than its factorization.

9978427284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118790815 (or 118790813 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 60.

The square root of 9978427284 is about 99892.0781844086. The cubic root of 9978427284 is about 2152.8843410653.

The spelling of 9978427284 in words is "nine billion, nine hundred seventy-eight million, four hundred twenty-seven thousand, two hundred eighty-four".