28764414391 has 2 divisors, whose sum is σ = 28764414392. Its totient is φ = 28764414390.

The previous prime is 28764414359. The next prime is 28764414401. The reversal of 28764414391 is 19341446782.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28764414391 - 2⁵ = 28764414359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28764414331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14382207195 + 14382207196.

It is an arithmetic number, because the mean of its divisors is an integer number (14382207196).

Almost surely, 2^28764414391 is an apocalyptic number.

28764414391 is a deficient number, since it is larger than the sum of its proper divisors (1).

28764414391 is an equidigital number, since it uses as much as digits as its factorization.

28764414391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 49.

The spelling of 28764414391 in words is "twenty-eight billion, seven hundred sixty-four million, four hundred fourteen thousand, three hundred ninety-one".