28000554 has 16 divisors (see below), whose sum is σ = 56790720. Its totient is φ = 9201920.

The previous prime is 28000543. The next prime is 28000559. The reversal of 28000554 is 45500082.

It is not an unprimeable number, because it can be changed into a prime (28000559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32439 + ... + 33290.

It is an arithmetic number, because the mean of its divisors is an integer number (3549420).

Almost surely, 2^28000554 is an apocalyptic number.

28000554 is an abundant number, since it is smaller than the sum of its proper divisors (28790166).

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

28000554 is a wasteful number, since it uses less digits than its factorization.

28000554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65805.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 28000554 is about 5291.5549699498. The cubic root of 28000554 is about 303.6608998771.

The spelling of 28000554 in words is "twenty-eight million, five hundred fifty-four", and thus it is an aban number.