28749129993 has 24 divisors (see below), whose sum is σ = 42460157376. Its totient is φ = 18738943200.

The previous prime is 28749129973. The next prime is 28749130051. The reversal of 28749129993 is 39992194782.

It is not a de Polignac number, because 28749129993 - 2¹⁴ = 28749113609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28749129993.

It is not an unprimeable number, because it can be changed into a prime (28749129943) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65103 + ... + 248468.

It is an arithmetic number, because the mean of its divisors is an integer number (1769173224).

Almost surely, 2^28749129993 is an apocalyptic number.

It is an amenable number.

28749129993 is a deficient number, since it is larger than the sum of its proper divisors (13711027383).

28749129993 is a wasteful number, since it uses less digits than its factorization.

28749129993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313805 (or 313802 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 28749129993 in words is "twenty-eight billion, seven hundred forty-nine million, one hundred twenty-nine thousand, nine hundred ninety-three".