28044401672 has 64 divisors (see below), whose sum is σ = 61698768000. Its totient is φ = 11945102400.

The previous prime is 28044401647. The next prime is 28044401729. The reversal of 28044401672 is 27610444082.

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, 415922 + ... + 478622.

It is an arithmetic number, because the mean of its divisors is an integer number (964043250).

Almost surely, 2^28044401672 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28044401672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30849384000).

28044401672 is an abundant number, since it is smaller than the sum of its proper divisors (33654366328).

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

28044401672 is a wasteful number, since it uses less digits than its factorization.

28044401672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62891 (or 62873 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The spelling of 28044401672 in words is "twenty-eight billion, forty-four million, four hundred one thousand, six hundred seventy-two".