28010005920 has 432 divisors, whose sum is σ = 104242451040. Its totient is φ = 6845589504.

The previous prime is 28010005897. The next prime is 28010005921. The reversal of 28010005920 is 2950001082.

It is not an unprimeable number, because it can be changed into a prime (28010005921) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 43561119 + ... + 43561761.

It is an arithmetic number, because the mean of its divisors is an integer number (241301970).

Almost surely, 2^28010005920 is an apocalyptic number.

28010005920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28010005920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52121225520).

28010005920 is an abundant number, since it is smaller than the sum of its proper divisors (76232445120).

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

28010005920 is a wasteful number, since it uses less digits than its factorization.

28010005920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 869 (or 845 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The spelling of 28010005920 in words is "twenty-eight billion, ten million, five thousand, nine hundred twenty".