28945099944 has 96 divisors (see below), whose sum is σ = 79599723840. Its totient is φ = 9500198400.

The previous prime is 28945099921. The next prime is 28945099949. The reversal of 28945099944 is 44999054982.

28945099944 is a `hidden beast` number, since 2 + 8 + 9 + 450 + 99 + 94 + 4 = 666.

It is not an unprimeable number, because it can be changed into a prime (28945099949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4500459 + ... + 4506885.

It is an arithmetic number, because the mean of its divisors is an integer number (829163790).

Almost surely, 2^28945099944 is an apocalyptic number.

28945099944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28945099944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39799861920).

28945099944 is an abundant number, since it is smaller than the sum of its proper divisors (50654623896).

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

28945099944 is a wasteful number, since it uses less digits than its factorization.

28945099944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7391 (or 7384 counting only the distinct ones).

The product of its (nonzero) digits is 33592320, while the sum is 63.

The spelling of 28945099944 in words is "twenty-eight billion, nine hundred forty-five million, ninety-nine thousand, nine hundred forty-four".