28181567058944 has 176 divisors, whose sum is σ = 61273551499776. Its totient is φ = 12877443072000.

The previous prime is 28181567058941. The next prime is 28181567058959. The reversal of 28181567058944 is 44985076518182.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28181567058941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2778968114 + ... + 2778978254.

It is an arithmetic number, because the mean of its divisors is an integer number (348145178976).

Almost surely, 2^{28181567058944} 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 28181567058944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30636775749888).

28181567058944 is an abundant number, since it is smaller than the sum of its proper divisors (33091984440832).

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

28181567058944 is a wasteful number, since it uses less digits than its factorization.

28181567058944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12232 (or 12214 counting only the distinct ones).

The product of its (nonzero) digits is 154828800, while the sum is 68.

The spelling of 28181567058944 in words is "twenty-eight trillion, one hundred eighty-one billion, five hundred sixty-seven million, fifty-eight thousand, nine hundred forty-four".