28499998554 has 40 divisors (see below), whose sum is σ = 63870830100. Its totient is φ = 9498553344.

The previous prime is 28499998543. The next prime is 28499998577. The reversal of 28499998554 is 45589999482.

28499998554 is a `hidden beast` number, since 2 + 8 + 499 + 9 + 9 + 85 + 54 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28164559329 + 335439225 = 167823^2 + 18315^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1863322 + ... + 1878554.

Almost surely, 2^28499998554 is an apocalyptic number.

28499998554 is an abundant number, since it is smaller than the sum of its proper divisors (35370831546).

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

28499998554 is a wasteful number, since it uses less digits than its factorization.

28499998554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26796 (or 26787 counting only the distinct ones).

The product of its digits is 335923200, while the sum is 72.

The spelling of 28499998554 in words is "twenty-eight billion, four hundred ninety-nine million, nine hundred ninety-eight thousand, five hundred fifty-four".