28743117387 has 16 divisors (see below), whose sum is σ = 40653564192. Its totient is φ = 18001543680.

The previous prime is 28743117371. The next prime is 28743117433. The reversal of 28743117387 is 78371134782.

It is not a de Polignac number, because 28743117387 - 2⁴ = 28743117371 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (28743117287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 493288 + ... + 548469.

It is an arithmetic number, because the mean of its divisors is an integer number (2540847762).

Almost surely, 2^28743117387 is an apocalyptic number.

28743117387 is a deficient number, since it is larger than the sum of its proper divisors (11910446805).

28743117387 is a wasteful number, since it uses less digits than its factorization.

28743117387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042318.

The product of its digits is 1580544, while the sum is 51.

The spelling of 28743117387 in words is "twenty-eight billion, seven hundred forty-three million, one hundred seventeen thousand, three hundred eighty-seven".