28756028742 has 96 divisors (see below), whose sum is σ = 69915685632. Its totient is φ = 7717949568.

The previous prime is 28756028729. The next prime is 28756028759. The reversal of 28756028742 is 24782065782.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1295913 + ... + 1317915.

It is an arithmetic number, because the mean of its divisors is an integer number (728288392).

Almost surely, 2^28756028742 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28756028742, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34957842816).

28756028742 is an abundant number, since it is smaller than the sum of its proper divisors (41159656890).

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

28756028742 is a wasteful number, since it uses less digits than its factorization.

28756028742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22110 (or 22081 counting only the distinct ones).

The product of its (nonzero) digits is 3010560, while the sum is 51.

The spelling of 28756028742 in words is "twenty-eight billion, seven hundred fifty-six million, twenty-eight thousand, seven hundred forty-two".