28507890450 has 48 divisors (see below), whose sum is σ = 76138001856. Its totient is φ = 7017326400.

The previous prime is 28507890403. The next prime is 28507890457. The reversal of 28507890450 is 5409870582.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28507890450.

It is not an unprimeable number, because it can be changed into a prime (28507890457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7307766 + ... + 7311665.

It is an arithmetic number, because the mean of its divisors is an integer number (1586208372).

Almost surely, 2^28507890450 is an apocalyptic number.

28507890450 is an abundant number, since it is smaller than the sum of its proper divisors (47630111406).

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

28507890450 is a wasteful number, since it uses less digits than its factorization.

28507890450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14619459 (or 14619454 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 28507890450 in words is "twenty-eight billion, five hundred seven million, eight hundred ninety thousand, four hundred fifty".