9778995 has 32 divisors (see below), whose sum is σ = 18411840. Its totient is φ = 4907520.

The previous prime is 9778991. The next prime is 9778997. The reversal of 9778995 is 5998779.

It is not a de Polignac number, because 9778995 - 2² = 9778991 is a prime.

It is an Ulam number.

9778995 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (9778991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 165 + ... + 4425.

It is an arithmetic number, because the mean of its divisors is an integer number (575370).

Almost surely, 2^9778995 is an apocalyptic number.

9778995 is a deficient number, since it is larger than the sum of its proper divisors (8632845).

9778995 is a wasteful number, since it uses less digits than its factorization.

9778995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292 (or 4286 counting only the distinct ones).

The product of its digits is 1428840, while the sum is 54.

The square root of 9778995 is about 3127.1384683125. The cubic root of 9778995 is about 213.8444949999.

The spelling of 9778995 in words is "nine million, seven hundred seventy-eight thousand, nine hundred ninety-five".