28773574144 has 160 divisors (see below), whose sum is σ = 66969213696. Its totient is φ = 12096430080.

The previous prime is 28773574139. The next prime is 28773574169. The reversal of 28773574144 is 44147537782.

It is a junction number, because it is equal to n+sod(n) for n = 28773574091 and 28773574100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58601739 + ... + 58602229.

Almost surely, 2^28773574144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28773574144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33484606848).

28773574144 is an abundant number, since it is smaller than the sum of its proper divisors (38195639552).

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

28773574144 is an equidigital number, since it uses as much as digits as its factorization.

28773574144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 780 counting only the distinct ones).

The product of its digits is 5268480, while the sum is 52.

The spelling of 28773574144 in words is "twenty-eight billion, seven hundred seventy-three million, five hundred seventy-four thousand, one hundred forty-four".