9863978 has 16 divisors (see below), whose sum is σ = 16091784. Its totient is φ = 4515840.

The previous prime is 9863951. The next prime is 9864007. The reversal of 9863978 is 8793689.

It can be written as a sum of positive squares in 4 ways, for example, as 9778129 + 85849 = 3127^2 + 293^2 .

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, 2663 + ... + 5178.

Almost surely, 2^9863978 is an apocalyptic number.

9863978 is a deficient number, since it is larger than the sum of its proper divisors (6227806).

9863978 is a wasteful number, since it uses less digits than its factorization.

9863978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7897.

The product of its digits is 653184, while the sum is 50.

The square root of 9863978 is about 3140.6970563873. The cubic root of 9863978 is about 214.4621711408.

The spelling of 9863978 in words is "nine million, eight hundred sixty-three thousand, nine hundred seventy-eight".