28285455442 has 8 divisors (see below), whose sum is σ = 42502751100. Its totient is φ = 14117871744.

The previous prime is 28285455431. The next prime is 28285455449. The reversal of 28285455442 is 24455458282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 27227970081 + 1057485361 = 165009^2 + 32519^2 .

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

It is a super-2 number, since 2×28285455442² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28285455449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12426567 + ... + 12428842.

Almost surely, 2^28285455442 is an apocalyptic number.

28285455442 is a deficient number, since it is larger than the sum of its proper divisors (14217295658).

28285455442 is a wasteful number, since it uses less digits than its factorization.

28285455442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24855980.

The product of its digits is 4096000, while the sum is 49.

The spelling of 28285455442 in words is "twenty-eight billion, two hundred eighty-five million, four hundred fifty-five thousand, four hundred forty-two".