28685084242 has 4 divisors (see below), whose sum is σ = 43027626366. Its totient is φ = 14342542120.

The previous prime is 28685084209. The next prime is 28685084243. The reversal of 28685084242 is 24248058682.

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., 19413127561 + 9271956681 = 139331^2 + 96291^2 .

It is not an unprimeable number, because it can be changed into a prime (28685084243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7171271059 + ... + 7171271062.

Almost surely, 2^28685084242 is an apocalyptic number.

28685084242 is a deficient number, since it is larger than the sum of its proper divisors (14342542124).

28685084242 is a wasteful number, since it uses less digits than its factorization.

28685084242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14342542123.

The product of its (nonzero) digits is 1966080, while the sum is 49.

The spelling of 28685084242 in words is "twenty-eight billion, six hundred eighty-five million, eighty-four thousand, two hundred forty-two".