28121059200 has 288 divisors, whose sum is σ = 100302497640. Its totient is φ = 6921707520.

The previous prime is 28121059189. The next prime is 28121059207. The reversal of 28121059200 is 295012182.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28121059207) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1613734 + ... + 1631066.

Almost surely, 2^28121059200 is an apocalyptic number.

28121059200 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 28121059200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50151248820).

28121059200 is an abundant number, since it is smaller than the sum of its proper divisors (72181438440).

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

28121059200 is a wasteful number, since it uses less digits than its factorization.

28121059200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17386 (or 17356 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The spelling of 28121059200 in words is "twenty-eight billion, one hundred twenty-one million, fifty-nine thousand, two hundred".