28750144500 has 864 divisors, whose sum is σ = 120232170240. Its totient is φ = 5645376000.

The previous prime is 28750144483. The next prime is 28750144531. The reversal of 28750144500 is 544105782.

28750144500 is a `hidden beast` number, since 2 + 8 + 7 + 5 + 0 + 144 + 500 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 72418302 + ... + 72418698.

Almost surely, 2^28750144500 is an apocalyptic number.

28750144500 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 28750144500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60116085120).

28750144500 is an abundant number, since it is smaller than the sum of its proper divisors (91482025740).

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

28750144500 is a wasteful number, since it uses less digits than its factorization.

28750144500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The spelling of 28750144500 in words is "twenty-eight billion, seven hundred fifty million, one hundred forty-four thousand, five hundred".