28287031754 has 4 divisors (see below), whose sum is σ = 42430547634. Its totient is φ = 14143515876.

The previous prime is 28287031753. The next prime is 28287031757. The reversal of 28287031754 is 45713078282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 27980256529 + 306775225 = 167273^2 + 17515^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28287031699 and 28287031708.

It is not an unprimeable number, because it can be changed into a prime (28287031753) 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 as a sum of consecutive naturals, namely, 7071757937 + ... + 7071757940.

Almost surely, 2^28287031754 is an apocalyptic number.

28287031754 is a deficient number, since it is larger than the sum of its proper divisors (14143515880).

28287031754 is a wasteful number, since it uses less digits than its factorization.

28287031754 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14143515879.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 28287031754 in words is "twenty-eight billion, two hundred eighty-seven million, thirty-one thousand, seven hundred fifty-four".