28873132900 has 18 divisors (see below), whose sum is σ = 62654698610. Its totient is φ = 11549253120.

The previous prime is 28873132861. The next prime is 28873132909. The reversal of 28873132900 is 923137882.

It can be written as a sum of positive squares in 3 ways, for example, as 1478248704 + 27394884196 = 38448^2 + 165514^2 .

It is a super-2 number, since 2×28873132900² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28873132909) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144365565 + ... + 144365764.

Almost surely, 2^28873132900 is an apocalyptic number.

28873132900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28873132900 is an abundant number, since it is smaller than the sum of its proper divisors (33781565710).

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

28873132900 is a wasteful number, since it uses less digits than its factorization.

28873132900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288731343 (or 288731336 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 28873132900 in words is "twenty-eight billion, eight hundred seventy-three million, one hundred thirty-two thousand, nine hundred".