28240773121 has 8 divisors (see below), whose sum is σ = 30809412000. Its totient is φ = 25672350240.

The previous prime is 28240773109. The next prime is 28240773131. The reversal of 28240773121 is 12137704282.

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

It is a cyclic number.

It is not a de Polignac number, because 28240773121 - 2²⁹ = 27703902209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28240773131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352405 + ... + 425053.

It is an arithmetic number, because the mean of its divisors is an integer number (3851176500).

It is a Proth number, since it is equal to 53865 ⋅ 2¹⁹ + 1 and 53865 < 2¹⁹.

Almost surely, 2^28240773121 is an apocalyptic number.

It is an amenable number.

28240773121 is a deficient number, since it is larger than the sum of its proper divisors (2568638879).

28240773121 is a wasteful number, since it uses less digits than its factorization.

28240773121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107999.

The product of its (nonzero) digits is 37632, while the sum is 37.

The spelling of 28240773121 in words is "twenty-eight billion, two hundred forty million, seven hundred seventy-three thousand, one hundred twenty-one".