28444137202880 has 112 divisors (see below), whose sum is σ = 77516353658880. Its totient is φ = 9738711395328.

The previous prime is 28444137202867. The next prime is 28444137202973. The reversal of 28444137202880 is 8820273144482.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7219952 + ... + 10441071.

Almost surely, 2^{28444137202880} is an apocalyptic number.

28444137202880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28444137202880 is an abundant number, since it is smaller than the sum of its proper divisors (49072216456000).

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

28444137202880 is a wasteful number, since it uses less digits than its factorization.

28444137202880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17661766 (or 17661756 counting only the distinct ones).

The product of its (nonzero) digits is 5505024, while the sum is 53.

The spelling of 28444137202880 in words is "twenty-eight trillion, four hundred forty-four billion, one hundred thirty-seven million, two hundred two thousand, eight hundred eighty".