28990749543 has 32 divisors (see below), whose sum is σ = 44381675520. Its totient is φ = 16489336800.

The previous prime is 28990749509. The next prime is 28990749559. The reversal of 28990749543 is 34594709982.

It is not a de Polignac number, because 28990749543 - 2⁹ = 28990749031 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28990749343) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4422118 + ... + 4428668.

It is an arithmetic number, because the mean of its divisors is an integer number (1386927360).

Almost surely, 2^28990749543 is an apocalyptic number.

28990749543 is a deficient number, since it is larger than the sum of its proper divisors (15390925977).

28990749543 is a wasteful number, since it uses less digits than its factorization.

28990749543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7507.

The product of its (nonzero) digits is 19595520, while the sum is 60.

The spelling of 28990749543 in words is "twenty-eight billion, nine hundred ninety million, seven hundred forty-nine thousand, five hundred forty-three".