9615978 has 24 divisors (see below), whose sum is σ = 21741408. Its totient is φ = 3065832.

The previous prime is 9615973. The next prime is 9615989. The reversal of 9615978 is 8795169.

9615978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (9615971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11200 + ... + 12027.

It is an arithmetic number, because the mean of its divisors is an integer number (905892).

Almost surely, 2^9615978 is an apocalyptic number.

9615978 is an abundant number, since it is smaller than the sum of its proper divisors (12125430).

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

9615978 is a wasteful number, since it uses less digits than its factorization.

9615978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23258 (or 23255 counting only the distinct ones).

The product of its digits is 136080, while the sum is 45.

The square root of 9615978 is about 3100.9640436484. The cubic root of 9615978 is about 212.6495593047.

The spelling of 9615978 in words is "nine million, six hundred fifteen thousand, nine hundred seventy-eight".