28581370272 has 576 divisors, whose sum is σ = 104266116864. Its totient is φ = 7226081280.

The previous prime is 28581370189. The next prime is 28581370379. The reversal of 28581370272 is 27207318582.

28581370272 is a `hidden beast` number, since 2 + 8 + 5 + 8 + 1 + 370 + 272 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 71993178 + ... + 71993574.

It is an arithmetic number, because the mean of its divisors is an integer number (181017564).

Almost surely, 2^28581370272 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 28581370272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52133058432).

28581370272 is an abundant number, since it is smaller than the sum of its proper divisors (75684746592).

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

28581370272 is a wasteful number, since it uses less digits than its factorization.

28581370272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541 (or 530 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The spelling of 28581370272 in words is "twenty-eight billion, five hundred eighty-one million, three hundred seventy thousand, two hundred seventy-two".