9978424424 has 8 divisors (see below), whose sum is σ = 18709545810. Its totient is φ = 4989212208.

The previous prime is 9978424409. The next prime is 9978424517. The reversal of 9978424424 is 4244248799.

It can be written as a sum of positive squares in only one way, i.e., 6255228100 + 3723196324 = 79090^2 + 61018^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 623651519 + ... + 623651534.

Almost surely, 2^9978424424 is an apocalyptic number.

It is an amenable number.

9978424424 is a deficient number, since it is larger than the sum of its proper divisors (8731121386).

9978424424 is a wasteful number, since it uses less digits than its factorization.

9978424424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247303059 (or 1247303055 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 53.

The square root of 9978424424 is about 99892.0638689581. The cubic root of 9978424424 is about 2152.8841353799.

The spelling of 9978424424 in words is "nine billion, nine hundred seventy-eight million, four hundred twenty-four thousand, four hundred twenty-four".