28057730441 has 8 divisors (see below), whose sum is σ = 30527524104. Its totient is φ = 25632437760.

The previous prime is 28057730419. The next prime is 28057730447. The reversal of 28057730441 is 14403775082.

It can be written as a sum of positive squares in 4 ways, for example, as 3060855625 + 24996874816 = 55325^2 + 158104^2 .

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 28057730441 - 2¹⁴ = 28057714057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28057730447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 11123930 + ... + 11126451.

It is an arithmetic number, because the mean of its divisors is an integer number (3815940513).

Almost surely, 2^28057730441 is an apocalyptic number.

It is an amenable number.

28057730441 is a deficient number, since it is larger than the sum of its proper divisors (2469793663).

28057730441 is a wasteful number, since it uses less digits than its factorization.

28057730441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22250491.

The product of its (nonzero) digits is 188160, while the sum is 41.

The spelling of 28057730441 in words is "twenty-eight billion, fifty-seven million, seven hundred thirty thousand, four hundred forty-one".