28378052429 has 2 divisors, whose sum is σ = 28378052430. Its totient is φ = 28378052428.

The previous prime is 28378052389. The next prime is 28378052459. The reversal of 28378052429 is 92425087382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22930136329 + 5447916100 = 151427^2 + 73810^2 .

It is a cyclic number.

It is not a de Polignac number, because 28378052429 - 2¹² = 28378048333 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28378052459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14189026214 + 14189026215.

It is an arithmetic number, because the mean of its divisors is an integer number (14189026215).

Almost surely, 2^28378052429 is an apocalyptic number.

It is an amenable number.

28378052429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28378052429 is an equidigital number, since it uses as much as digits as its factorization.

28378052429 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 50.

The spelling of 28378052429 in words is "twenty-eight billion, three hundred seventy-eight million, fifty-two thousand, four hundred twenty-nine".