9778825 has 48 divisors (see below), whose sum is σ = 15534720. Its totient is φ = 5944320.

The previous prime is 9778819. The next prime is 9778843. The reversal of 9778825 is 5288779.

9778825 = T₂₄₆ + T₂₄₇ + ... + T₄₁₈.

It is not a de Polignac number, because 9778825 - 2³ = 9778817 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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 47 ways as a sum of consecutive naturals, for example, 56439 + ... + 56611.

It is an arithmetic number, because the mean of its divisors is an integer number (323640).

Almost surely, 2^9778825 is an apocalyptic number.

9778825 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

9778825 is a deficient number, since it is larger than the sum of its proper divisors (5755895).

9778825 is a wasteful number, since it uses less digits than its factorization.

9778825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226 (or 221 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The square root of 9778825 is about 3127.1112867949. Note that the first 3 decimals coincide. The cubic root of 9778825 is about 213.8432558209.

Subtracting from 9778825 its sum of digits (46), we obtain a palindrome (9778779).

The spelling of 9778825 in words is "nine million, seven hundred seventy-eight thousand, eight hundred twenty-five".