28021523760 has 960 divisors, whose sum is σ = 111142886400. Its totient is φ = 6284500992.

The previous prime is 28021523707. The next prime is 28021523773. The reversal of 28021523760 is 6732512082.

28021523760 is a `hidden beast` number, since 280 + 2 + 1 + 5 + 2 + 376 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 337608679 + ... + 337608761.

It is an arithmetic number, because the mean of its divisors is an integer number (115773840).

Almost surely, 2^28021523760 is an apocalyptic number.

28021523760 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 28021523760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55571443200).

28021523760 is an abundant number, since it is smaller than the sum of its proper divisors (83121362640).

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

28021523760 is a wasteful number, since it uses less digits than its factorization.

28021523760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The spelling of 28021523760 in words is "twenty-eight billion, twenty-one million, five hundred twenty-three thousand, seven hundred sixty".