28133724578 has 8 divisors (see below), whose sum is σ = 42251617872. Its totient is φ = 14049851956.

The previous prime is 28133724569. The next prime is 28133724581. The reversal of 28133724578 is 87542733182.

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

It is a super-2 number, since 2×28133724578² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8503100 + ... + 8506407.

It is an arithmetic number, because the mean of its divisors is an integer number (5281452234).

Almost surely, 2^28133724578 is an apocalyptic number.

28133724578 is a deficient number, since it is larger than the sum of its proper divisors (14117893294).

28133724578 is a wasteful number, since it uses less digits than its factorization.

28133724578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17010336.

The product of its digits is 2257920, while the sum is 50.

The spelling of 28133724578 in words is "twenty-eight billion, one hundred thirty-three million, seven hundred twenty-four thousand, five hundred seventy-eight".