28742746536 has 384 divisors, whose sum is σ = 98338406400. Its totient is φ = 7739867520.

The previous prime is 28742746457. The next prime is 28742746547. The reversal of 28742746536 is 63564724782.

28742746536 is a `hidden beast` number, since 2 + 87 + 4 + 27 + 4 + 6 + 536 = 666.

It is a super-2 number, since 2×28742746536² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 17282841 + ... + 17284503.

It is an arithmetic number, because the mean of its divisors is an integer number (256089600).

Almost surely, 2^28742746536 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 28742746536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49169203200).

28742746536 is an abundant number, since it is smaller than the sum of its proper divisors (69595659864).

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

28742746536 is a wasteful number, since it uses less digits than its factorization.

28742746536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1786 (or 1769 counting only the distinct ones).

The product of its digits is 13547520, while the sum is 54.

The spelling of 28742746536 in words is "twenty-eight billion, seven hundred forty-two million, seven hundred forty-six thousand, five hundred thirty-six".