28992440743848 has 72 divisors (see below), whose sum is σ = 81537097015530. Its totient is φ = 9664146897120.

The previous prime is 28992440743841. The next prime is 28992440743867. The reversal of 28992440743848 is 84834704429982.

28992440743848 is a `hidden beast` number, since 2 + 8 + 99 + 24 + 40 + 7 + 438 + 48 = 666.

It can be written as a sum of positive squares in only one way, i.e., 28768827140964 + 223613602884 = 5363658^2 + 472878^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is not an unprimeable number, because it can be changed into a prime (28992440743841) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 276129123 + ... + 276234098.

Almost surely, 2^{28992440743848} is an apocalyptic number.

It is an amenable number.

28992440743848 is an abundant number, since it is smaller than the sum of its proper divisors (52544656271682).

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

28992440743848 is an frugal number, since it uses more digits than its factorization.

28992440743848 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552363251 (or 552363226 counting only the distinct ones).

The product of its (nonzero) digits is 891813888, while the sum is 72.

The spelling of 28992440743848 in words is "twenty-eight trillion, nine hundred ninety-two billion, four hundred forty million, seven hundred forty-three thousand, eight hundred forty-eight".