28208385072 has 360 divisors, whose sum is σ = 94679846352. Its totient is φ = 7812403200.

The previous prime is 28208385067. The next prime is 28208385137. The reversal of 28208385072 is 27058380282.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 81292003 + ... + 81292349.

Almost surely, 2^28208385072 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 28208385072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47339923176).

28208385072 is an abundant number, since it is smaller than the sum of its proper divisors (66471461280).

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

28208385072 is a wasteful number, since it uses less digits than its factorization.

28208385072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 697 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The spelling of 28208385072 in words is "twenty-eight billion, two hundred eight million, three hundred eighty-five thousand, seventy-two".