28244721058437 has 24 divisors (see below), whose sum is σ = 40805997470688. Its totient is φ = 17370013377600.

The previous prime is 28244721058369. The next prime is 28244721058447. The reversal of 28244721058437 is 73485012744282.

It is not a de Polignac number, because 28244721058437 - 2³⁶ = 28176001581701 is a prime.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28244721058447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17417614 + ... + 18970047.

It is an arithmetic number, because the mean of its divisors is an integer number (1700249894612).

Almost surely, 2^{28244721058437} is an apocalyptic number.

It is an amenable number.

28244721058437 is a deficient number, since it is larger than the sum of its proper divisors (12561276412251).

28244721058437 is a wasteful number, since it uses less digits than its factorization.

28244721058437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36389221 (or 36389208 counting only the distinct ones).

The product of its (nonzero) digits is 24084480, while the sum is 57.

The spelling of 28244721058437 in words is "twenty-eight trillion, two hundred forty-four billion, seven hundred twenty-one million, fifty-eight thousand, four hundred thirty-seven".