28745728554 has 8 divisors (see below), whose sum is σ = 57491457120. Its totient is φ = 9581909516.

The previous prime is 28745728547. The next prime is 28745728559. The reversal of 28745728554 is 45582754782.

It is a sphenic number, since it is the product of 3 distinct primes.

28745728554 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28745728494 and 28745728503.

It is not an unprimeable number, because it can be changed into a prime (28745728559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2395477374 + ... + 2395477385.

It is an arithmetic number, because the mean of its divisors is an integer number (7186432140).

Almost surely, 2^28745728554 is an apocalyptic number.

28745728554 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28745728554 is a wasteful number, since it uses less digits than its factorization.

28745728554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4790954764.

The product of its digits is 25088000, while the sum is 57.

The spelling of 28745728554 in words is "twenty-eight billion, seven hundred forty-five million, seven hundred twenty-eight thousand, five hundred fifty-four".