28224658642 has 16 divisors (see below), whose sum is σ = 43215763032. Its totient is φ = 13821390720.

The previous prime is 28224658573. The next prime is 28224658661. The reversal of 28224658642 is 24685642282.

It can be written as a sum of positive squares in 4 ways, for example, as 5474668081 + 22749990561 = 73991^2 + 150831^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 468033 + ... + 524884.

Almost surely, 2^28224658642 is an apocalyptic number.

28224658642 is a deficient number, since it is larger than the sum of its proper divisors (14991104390).

28224658642 is a wasteful number, since it uses less digits than its factorization.

28224658642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993213.

The product of its digits is 2949120, while the sum is 49.

The spelling of 28224658642 in words is "twenty-eight billion, two hundred twenty-four million, six hundred fifty-eight thousand, six hundred forty-two".