28425020242 has 4 divisors (see below), whose sum is σ = 42637530366. Its totient is φ = 14212510120.

The previous prime is 28425020237. The next prime is 28425020249. The reversal of 28425020242 is 24202052482.

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., 14913050161 + 13511970081 = 122119^2 + 116241^2 .

It is not an unprimeable number, because it can be changed into a prime (28425020249) 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, 7106255059 + ... + 7106255062.

Almost surely, 2^28425020242 is an apocalyptic number.

28425020242 is a deficient number, since it is larger than the sum of its proper divisors (14212510124).

28425020242 is a wasteful number, since it uses less digits than its factorization.

28425020242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14212510123.

The product of its (nonzero) digits is 20480, while the sum is 31.

The spelling of 28425020242 in words is "twenty-eight billion, four hundred twenty-five million, twenty thousand, two hundred forty-two".