9649978 has 8 divisors (see below), whose sum is σ = 15588468. Its totient is φ = 4453824.

The previous prime is 9649973. The next prime is 9649979. The reversal of 9649978 is 8799469.

It can be written as a sum of positive squares in 2 ways, for example, as 9529569 + 120409 = 3087^2 + 347^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (9649973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185551 + ... + 185602.

Almost surely, 2^9649978 is an apocalyptic number.

9649978 is a deficient number, since it is larger than the sum of its proper divisors (5938490).

9649978 is a wasteful number, since it uses less digits than its factorization.

9649978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371168.

The product of its digits is 979776, while the sum is 52.

The square root of 9649978 is about 3106.4413723745. The cubic root of 9649978 is about 212.8998919761.

The spelling of 9649978 in words is "nine million, six hundred forty-nine thousand, nine hundred seventy-eight".