28774414391 has 2 divisors, whose sum is σ = 28774414392. Its totient is φ = 28774414390.

The previous prime is 28774414379. The next prime is 28774414483. The reversal of 28774414391 is 19341447782.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28774414391 - 2³⁰ = 27700672567 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28764414391) 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 as a sum of consecutive naturals, namely, 14387207195 + 14387207196.

It is an arithmetic number, because the mean of its divisors is an integer number (14387207196).

Almost surely, 2^28774414391 is an apocalyptic number.

28774414391 is a deficient number, since it is larger than the sum of its proper divisors (1).

28774414391 is an equidigital number, since it uses as much as digits as its factorization.

28774414391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 50.

The spelling of 28774414391 in words is "twenty-eight billion, seven hundred seventy-four million, four hundred fourteen thousand, three hundred ninety-one".