28742971120 has 20 divisors (see below), whose sum is σ = 66827408040. Its totient is φ = 11497188416.

The previous prime is 28742971097. The next prime is 28742971129. The reversal of 28742971120 is 2117924782.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28742971129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 179643490 + ... + 179643649.

It is an arithmetic number, because the mean of its divisors is an integer number (3341370402).

Almost surely, 2^28742971120 is an apocalyptic number.

28742971120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28742971120 is an abundant number, since it is smaller than the sum of its proper divisors (38084436920).

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

28742971120 is a wasteful number, since it uses less digits than its factorization.

28742971120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359287152 (or 359287146 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 28742971120 in words is "twenty-eight billion, seven hundred forty-two million, nine hundred seventy-one thousand, one hundred twenty".