9778698 has 16 divisors (see below), whose sum is σ = 21730560. Its totient is φ = 3259548.

The previous prime is 9778687. The next prime is 9778739. The reversal of 9778698 is 8968779.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 181087 = 9778698 / (9 + 7 + 7 + 8 + 6 + 9 + 8).

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, 90490 + ... + 90597.

It is an arithmetic number, because the mean of its divisors is an integer number (1358160).

Almost surely, 2^9778698 is an apocalyptic number.

9778698 is an abundant number, since it is smaller than the sum of its proper divisors (11951862).

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

9778698 is a wasteful number, since it uses less digits than its factorization.

9778698 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181098 (or 181092 counting only the distinct ones).

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

The square root of 9778698 is about 3127.0909804481. The cubic root of 9778698 is about 213.8423300719.

The spelling of 9778698 in words is "nine million, seven hundred seventy-eight thousand, six hundred ninety-eight".