28775015429 has 2 divisors, whose sum is σ = 28775015430. Its totient is φ = 28775015428.

The previous prime is 28775015411. The next prime is 28775015447. The reversal of 28775015429 is 92451057782.

It is a balanced prime because it is at equal distance from previous prime (28775015411) and next prime (28775015447).

It can be written as a sum of positive squares in only one way, i.e., 16437804100 + 12337211329 = 128210^2 + 111073^2 .

It is a cyclic number.

It is not a de Polignac number, because 28775015429 - 2⁸ = 28775015173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28775017429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14387507714 + 14387507715.

It is an arithmetic number, because the mean of its divisors is an integer number (14387507715).

Almost surely, 2^28775015429 is an apocalyptic number.

It is an amenable number.

28775015429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28775015429 is an equidigital number, since it uses as much as digits as its factorization.

28775015429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1411200, while the sum is 50.

The spelling of 28775015429 in words is "twenty-eight billion, seven hundred seventy-five million, fifteen thousand, four hundred twenty-nine".