28252442642 has 8 divisors (see below), whose sum is σ = 42386101632. Its totient is φ = 14123742100.

The previous prime is 28252442599. The next prime is 28252442663. The reversal of 28252442642 is 24624425282.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 28252442642.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1225334 + ... + 1248177.

It is an arithmetic number, because the mean of its divisors is an integer number (5298262704).

Almost surely, 2^28252442642 is an apocalyptic number.

28252442642 is a deficient number, since it is larger than the sum of its proper divisors (14133658990).

28252442642 is a wasteful number, since it uses less digits than its factorization.

28252442642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2479224.

The product of its digits is 491520, while the sum is 41.

The spelling of 28252442642 in words is "twenty-eight billion, two hundred fifty-two million, four hundred forty-two thousand, six hundred forty-two".