28444737204688 has 30 divisors (see below), whose sum is σ = 64109503369986. Its totient is φ = 12190601658816.

The previous prime is 28444737204661. The next prime is 28444737204721. The reversal of 28444737204688 is 88640273744482.

It can be written as a sum of positive squares in only one way, i.e., 16925555508624 + 11519181696064 = 4114068^2 + 3393992^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18140775495 + ... + 18140777062.

Almost surely, 2^{28444737204688} is an apocalyptic number.

28444737204688 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28444737204688 is an abundant number, since it is smaller than the sum of its proper divisors (35664766165298).

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

28444737204688 is a wasteful number, since it uses less digits than its factorization.

28444737204688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36281552579 (or 36281552566 counting only the distinct ones).

The product of its (nonzero) digits is 462422016, while the sum is 67.

The spelling of 28444737204688 in words is "twenty-eight trillion, four hundred forty-four billion, seven hundred thirty-seven million, two hundred four thousand, six hundred eighty-eight".