28125009450 has 72 divisors (see below), whose sum is σ = 75583430208. Its totient is φ = 7497927840.

The previous prime is 28125009443. The next prime is 28125009461. The reversal of 28125009450 is 5490052182.

28125009450 is a `hidden beast` number, since 2 + 8 + 12 + 500 + 94 + 50 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2310079 + ... + 2322221.

It is an arithmetic number, because the mean of its divisors is an integer number (1049769864).

Almost surely, 2^28125009450 is an apocalyptic number.

28125009450 is an abundant number, since it is smaller than the sum of its proper divisors (47458420758).

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

28125009450 is a wasteful number, since it uses less digits than its factorization.

28125009450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17308 (or 17300 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The spelling of 28125009450 in words is "twenty-eight billion, one hundred twenty-five million, nine thousand, four hundred fifty".