28031583890 has 8 divisors (see below), whose sum is σ = 50456851020. Its totient is φ = 11212633552.

The previous prime is 28031583887. The next prime is 28031583919. The reversal of 28031583890 is 9838513082.

It can be written as a sum of positive squares in 2 ways, for example, as 27662675041 + 368908849 = 166321^2 + 19207^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401579185 + ... + 1401579204.

Almost surely, 2^28031583890 is an apocalyptic number.

28031583890 is a deficient number, since it is larger than the sum of its proper divisors (22425267130).

28031583890 is a wasteful number, since it uses less digits than its factorization.

28031583890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803158396.

The product of its (nonzero) digits is 414720, while the sum is 47.

The spelling of 28031583890 in words is "twenty-eight billion, thirty-one million, five hundred eighty-three thousand, eight hundred ninety".