28030942757381 has 2 divisors, whose sum is σ = 28030942757382. Its totient is φ = 28030942757380.

The previous prime is 28030942757371. The next prime is 28030942757423. The reversal of 28030942757381 is 18375724903082.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18108505757281 + 9922437000100 = 4255409^2 + 3149990^2 .

It is a cyclic number.

It is not a de Polignac number, because 28030942757381 - 2²² = 28030938563077 is a prime.

It is a super-2 number, since 2×28030942757381² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28030942757381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28030942757371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14015471378690 + 14015471378691.

It is an arithmetic number, because the mean of its divisors is an integer number (14015471378691).

Almost surely, 2^{28030942757381} is an apocalyptic number.

It is an amenable number.

28030942757381 is a deficient number, since it is larger than the sum of its proper divisors (1).

28030942757381 is an equidigital number, since it uses as much as digits as its factorization.

28030942757381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 59.

The spelling of 28030942757381 in words is "twenty-eight trillion, thirty billion, nine hundred forty-two million, seven hundred fifty-seven thousand, three hundred eighty-one".