9996978 has 16 divisors (see below), whose sum is σ = 20111616. Its totient is φ = 3312720.

The previous prime is 9996949. The next prime is 9996979. The reversal of 9996978 is 8796999.

It is not an unprimeable number, because it can be changed into a prime (9996979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3778 + ... + 5853.

It is an arithmetic number, because the mean of its divisors is an integer number (1256976).

Almost surely, 2^9996978 is an apocalyptic number.

9996978 is an abundant number, since it is smaller than the sum of its proper divisors (10114638).

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

9996978 is a wasteful number, since it uses less digits than its factorization.

9996978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9809.

The product of its digits is 2204496, while the sum is 57.

The square root of 9996978 is about 3161.7998039092. The cubic root of 9996978 is about 215.4217644779.

The spelling of 9996978 in words is "nine million, nine hundred ninety-six thousand, nine hundred seventy-eight".