28568921390 has 8 divisors (see below), whose sum is σ = 51424058520. Its totient is φ = 11427568552.

The previous prime is 28568921387. The next prime is 28568921419. The reversal of 28568921390 is 9312986582.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428446060 + ... + 1428446079.

It is an arithmetic number, because the mean of its divisors is an integer number (6428007315).

Almost surely, 2^28568921390 is an apocalyptic number.

28568921390 is a deficient number, since it is larger than the sum of its proper divisors (22855137130).

28568921390 is a wasteful number, since it uses less digits than its factorization.

28568921390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2856892146.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The spelling of 28568921390 in words is "twenty-eight billion, five hundred sixty-eight million, nine hundred twenty-one thousand, three hundred ninety".