28044887040 has 352 divisors, whose sum is σ = 102378821760. Its totient is φ = 7275184128.

The previous prime is 28044887023. The next prime is 28044887041. The reversal of 28044887040 is 4078844082.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (28044887041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5112139 + ... + 5117621.

Almost surely, 2^28044887040 is an apocalyptic number.

28044887040 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 28044887040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51189410880).

28044887040 is an abundant number, since it is smaller than the sum of its proper divisors (74333934720).

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

28044887040 is a wasteful number, since it uses less digits than its factorization.

28044887040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5554 (or 5530 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 45.

The spelling of 28044887040 in words is "twenty-eight billion, forty-four million, eight hundred eighty-seven thousand, forty".