9978530 has 32 divisors (see below), whose sum is σ = 18673200. Its totient is φ = 3836160.

The previous prime is 9978461. The next prime is 9978547. The reversal of 9978530 is 358799.

It can be written as a sum of positive squares in 8 ways, for example, as 1399489 + 8579041 = 1183^2 + 2929^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55040 + ... + 55220.

Almost surely, 2^9978530 is an apocalyptic number.

9978530 is a deficient number, since it is larger than the sum of its proper divisors (8694670).

9978530 is a wasteful number, since it uses less digits than its factorization.

9978530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374.

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 9978530 is about 3158.8811310336. The cubic root of 9978530 is about 215.2891728165.

The spelling of 9978530 in words is "nine million, nine hundred seventy-eight thousand, five hundred thirty".