28897171200 has 648 divisors, whose sum is σ = 113546513808. Its totient is φ = 7245987840.

The previous prime is 28897171169. The next prime is 28897171207. The reversal of 28897171200 is 217179882.

It is a tau number, because it is divible by the number of its divisors (648).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28897171207) 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, 26437854 + ... + 26438946.

Almost surely, 2^28897171200 is an apocalyptic number.

28897171200 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 28897171200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56773256904).

28897171200 is an abundant number, since it is smaller than the sum of its proper divisors (84649342608).

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

28897171200 is a wasteful number, since it uses less digits than its factorization.

28897171200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1151 (or 1120 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The spelling of 28897171200 in words is "twenty-eight billion, eight hundred ninety-seven million, one hundred seventy-one thousand, two hundred".