28578745450 has 48 divisors (see below), whose sum is σ = 55489948416. Its totient is φ = 10930075200.

The previous prime is 28578745421. The next prime is 28578745511. The reversal of 28578745450 is 5454787582.

It is a junction number, because it is equal to n+sod(n) for n = 28578745391 and 28578745400.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5276944 + ... + 5282356.

It is an arithmetic number, because the mean of its divisors is an integer number (1156040592).

Almost surely, 2^28578745450 is an apocalyptic number.

28578745450 is a deficient number, since it is larger than the sum of its proper divisors (26911202966).

28578745450 is a wasteful number, since it uses less digits than its factorization.

28578745450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10039 (or 10034 counting only the distinct ones).

The product of its (nonzero) digits is 12544000, while the sum is 55.

The spelling of 28578745450 in words is "twenty-eight billion, five hundred seventy-eight million, seven hundred forty-five thousand, four hundred fifty".