28269481344 has 256 divisors, whose sum is σ = 82846848000. Its totient is φ = 8488157184.

The previous prime is 28269481333. The next prime is 28269481397. The reversal of 28269481344 is 44318496282.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 38253327 + ... + 38254065.

It is an arithmetic number, because the mean of its divisors is an integer number (323620500).

Almost surely, 2^28269481344 is an apocalyptic number.

28269481344 is a gapful number since it is divisible by the number (24) 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 28269481344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41423424000).

28269481344 is an abundant number, since it is smaller than the sum of its proper divisors (54577366656).

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

28269481344 is a wasteful number, since it uses less digits than its factorization.

28269481344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945 (or 933 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 51.

The spelling of 28269481344 in words is "twenty-eight billion, two hundred sixty-nine million, four hundred eighty-one thousand, three hundred forty-four".