28993513998 has 32 divisors (see below), whose sum is σ = 59419567872. Its totient is φ = 9425892800.

The previous prime is 28993513979. The next prime is 28993514003. The reversal of 28993513998 is 89931539982.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 874993 + ... + 907523.

It is an arithmetic number, because the mean of its divisors is an integer number (1856861496).

Almost surely, 2^28993513998 is an apocalyptic number.

28993513998 is an abundant number, since it is smaller than the sum of its proper divisors (30426053874).

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

28993513998 is a wasteful number, since it uses less digits than its factorization.

28993513998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36200.

The product of its digits is 37791360, while the sum is 66.

The spelling of 28993513998 in words is "twenty-eight billion, nine hundred ninety-three million, five hundred thirteen thousand, nine hundred ninety-eight".