28762644121 has 8 divisors (see below), whose sum is σ = 29032403400. Its totient is φ = 28492992000.

The previous prime is 28762644101. The next prime is 28762644203. The reversal of 28762644121 is 12144626782.

It can be written as a sum of positive squares in 4 ways, for example, as 19248787600 + 9513856521 = 138740^2 + 97539^2 .

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 28762644121 - 2¹⁹ = 28762119833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28762644101) 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, 575625 + ... + 623593.

It is an arithmetic number, because the mean of its divisors is an integer number (3629050425).

Almost surely, 2^28762644121 is an apocalyptic number.

It is an amenable number.

28762644121 is a deficient number, since it is larger than the sum of its proper divisors (269759279).

28762644121 is a wasteful number, since it uses less digits than its factorization.

28762644121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53579.

The product of its digits is 258048, while the sum is 43.

The spelling of 28762644121 in words is "twenty-eight billion, seven hundred sixty-two million, six hundred forty-four thousand, one hundred twenty-one".