28839222720 has 896 divisors, whose sum is σ = 128934789120. Its totient is φ = 5894000640.

The previous prime is 28839222719. The next prime is 28839222821. The reversal of 28839222720 is 2722293882.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 44573437 + ... + 44574083.

Almost surely, 2^28839222720 is an apocalyptic number.

28839222720 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 28839222720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64467394560).

28839222720 is an abundant number, since it is smaller than the sum of its proper divisors (100095566400).

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

28839222720 is a wasteful number, since it uses less digits than its factorization.

28839222720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 758 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 28839222720 in words is "twenty-eight billion, eight hundred thirty-nine million, two hundred twenty-two thousand, seven hundred twenty".