9778950 has 72 divisors (see below), whose sum is σ = 27158976. Its totient is φ = 2520000.

The previous prime is 9778943. The next prime is 9778963. The reversal of 9778950 is 598779.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 9778896 and 9778905.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13600 + ... + 14300.

It is an arithmetic number, because the mean of its divisors is an integer number (377208).

Almost surely, 2^9778950 is an apocalyptic number.

9778950 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 9778950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13579488).

9778950 is an abundant number, since it is smaller than the sum of its proper divisors (17380026).

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

9778950 is a wasteful number, since it uses less digits than its factorization.

9778950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 45.

The square root of 9778950 is about 3127.1312732279. The cubic root of 9778950 is about 213.8441669833.

The spelling of 9778950 in words is "nine million, seven hundred seventy-eight thousand, nine hundred fifty".