28749448320 has 64 divisors (see below), whose sum is σ = 91638872640. Its totient is φ = 7666519040.

The previous prime is 28749448319. The next prime is 28749448327. The reversal of 28749448320 is 2384494782.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (28749448327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7484916 + ... + 7488755.

It is an arithmetic number, because the mean of its divisors is an integer number (1431857385).

Almost surely, 2^28749448320 is an apocalyptic number.

28749448320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28749448320 is an abundant number, since it is smaller than the sum of its proper divisors (62889424320).

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

28749448320 is a wasteful number, since it uses less digits than its factorization.

28749448320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14973693 (or 14973681 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 51.

The spelling of 28749448320 in words is "twenty-eight billion, seven hundred forty-nine million, four hundred forty-eight thousand, three hundred twenty".