9945782 has 64 divisors (see below), whose sum is σ = 20528640. Its totient is φ = 3494400.

The previous prime is 9945781. The next prime is 9945841. The reversal of 9945782 is 2875499.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9945781) 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, 75857 + ... + 75987.

It is an arithmetic number, because the mean of its divisors is an integer number (320760).

Almost surely, 2^9945782 is an apocalyptic number.

9945782 is an abundant number, since it is smaller than the sum of its proper divisors (10582858).

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

9945782 is a wasteful number, since it uses less digits than its factorization.

9945782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197.

The product of its digits is 181440, while the sum is 44.

The square root of 9945782 is about 3153.6933902965. The cubic root of 9945782 is about 215.0533993916.

It can be divided in two parts, 994 and 5782, that added together give a palindrome (6776).

The spelling of 9945782 in words is "nine million, nine hundred forty-five thousand, seven hundred eighty-two".