28571370534 has 96 divisors (see below), whose sum is σ = 73296777216. Its totient is φ = 7871100480.

The previous prime is 28571370491. The next prime is 28571370551. The reversal of 28571370534 is 43507317582.

28571370534 is a `hidden beast` number, since 2 + 8 + 571 + 3 + 70 + 5 + 3 + 4 = 666.

It is a super-2 number, since 2×28571370534² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28571370534.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1068759 + ... + 1095165.

It is an arithmetic number, because the mean of its divisors is an integer number (763508096).

Almost surely, 2^28571370534 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28571370534, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36648388608).

28571370534 is an abundant number, since it is smaller than the sum of its proper divisors (44725406682).

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

28571370534 is a wasteful number, since it uses less digits than its factorization.

28571370534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26730 (or 26727 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The spelling of 28571370534 in words is "twenty-eight billion, five hundred seventy-one million, three hundred seventy thousand, five hundred thirty-four".