9876978 has 24 divisors (see below), whose sum is σ = 22193808. Its totient is φ = 3292164.

The previous prime is 9876961. The next prime is 9877001. The reversal of 9876978 is 8796789.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9676 + ... + 10647.

It is an arithmetic number, because the mean of its divisors is an integer number (924742).

Almost surely, 2^9876978 is an apocalyptic number.

9876978 is an abundant number, since it is smaller than the sum of its proper divisors (12316830).

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

9876978 is a wasteful number, since it uses less digits than its factorization.

9876978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20340 (or 20328 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 54.

The square root of 9876978 is about 3142.7659791973. The cubic root of 9876978 is about 214.5563449222.

The spelling of 9876978 in words is "nine million, eight hundred seventy-six thousand, nine hundred seventy-eight".