28444000537 has 2 divisors, whose sum is σ = 28444000538. Its totient is φ = 28444000536.

The previous prime is 28444000511. The next prime is 28444000561. The reversal of 28444000537 is 73500044482.

It is the 68853-rd star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28438100496 + 5900041 = 168636^2 + 2429^2 .

It is a cyclic number.

It is not a de Polignac number, because 28444000537 - 2¹⁹ = 28443476249 is a prime.

It is a super-2 number, since 2×28444000537² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28444000496 and 28444000505.

It is not a weakly prime, because it can be changed into another prime (28444000577) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14222000268 + 14222000269.

It is an arithmetic number, because the mean of its divisors is an integer number (14222000269).

Almost surely, 2^28444000537 is an apocalyptic number.

It is an amenable number.

28444000537 is a deficient number, since it is larger than the sum of its proper divisors (1).

28444000537 is an equidigital number, since it uses as much as digits as its factorization.

28444000537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 37.

The spelling of 28444000537 in words is "twenty-eight billion, four hundred forty-four million, five hundred thirty-seven", and thus it is an aban number.