28129039800 has 384 divisors, whose sum is σ = 95725748160. Its totient is φ = 6805094400.

The previous prime is 28129039777. The next prime is 28129039819. The reversal of 28129039800 is 893092182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 32976174 + ... + 32977026.

Almost surely, 2^28129039800 is an apocalyptic number.

28129039800 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 28129039800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47862874080).

28129039800 is an abundant number, since it is smaller than the sum of its proper divisors (67596708360).

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

28129039800 is a wasteful number, since it uses less digits than its factorization.

28129039800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003 (or 994 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The spelling of 28129039800 in words is "twenty-eight billion, one hundred twenty-nine million, thirty-nine thousand, eight hundred".