28550407442 has 16 divisors (see below), whose sum is σ = 42923152152. Its totient is φ = 14242725120.

The previous prime is 28550407439. The next prime is 28550407481. The reversal of 28550407442 is 24470405582.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21909624361 + 6640783081 = 148019^2 + 81491^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28550407442.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1835048 + ... + 1850540.

Almost surely, 2^28550407442 is an apocalyptic number.

28550407442 is a deficient number, since it is larger than the sum of its proper divisors (14372744710).

28550407442 is a wasteful number, since it uses less digits than its factorization.

28550407442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17533.

The product of its (nonzero) digits is 358400, while the sum is 41.

The spelling of 28550407442 in words is "twenty-eight billion, five hundred fifty million, four hundred seven thousand, four hundred forty-two".