28389700800 has 1344 divisors, whose sum is σ = 119735193600. Its totient is φ = 6502809600.

The previous prime is 28389700753. The next prime is 28389700813. The reversal of 28389700800 is 800798382.

It is a super-2 number, since 2×28389700800² (a number of 22 digits) contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 660225579 + ... + 660225621.

Almost surely, 2^28389700800 is an apocalyptic number.

28389700800 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 28389700800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59867596800).

28389700800 is an abundant number, since it is smaller than the sum of its proper divisors (91345492800).

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

28389700800 is a wasteful number, since it uses less digits than its factorization.

28389700800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 28389700800 in words is "twenty-eight billion, three hundred eighty-nine million, seven hundred thousand, eight hundred".