28286432242 has 4 divisors (see below), whose sum is σ = 42429648366. Its totient is φ = 14143216120.

The previous prime is 28286432233. The next prime is 28286432261. The reversal of 28286432242 is 24223468282.

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., 21959979721 + 6326452521 = 148189^2 + 79539^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7071608059 + ... + 7071608062.

Almost surely, 2^28286432242 is an apocalyptic number.

28286432242 is a deficient number, since it is larger than the sum of its proper divisors (14143216124).

28286432242 is a wasteful number, since it uses less digits than its factorization.

28286432242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14143216123.

The product of its digits is 589824, while the sum is 43.

The spelling of 28286432242 in words is "twenty-eight billion, two hundred eighty-six million, four hundred thirty-two thousand, two hundred forty-two".