28340348447 has 4 divisors (see below), whose sum is σ = 28355211576. Its totient is φ = 28325485320.

The previous prime is 28340348429. The next prime is 28340348479. The reversal of 28340348447 is 74484304382.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28340348447 - 2¹⁴ = 28340332063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28340348417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7428704 + ... + 7432517.

It is an arithmetic number, because the mean of its divisors is an integer number (7088802894).

Almost surely, 2^28340348447 is an apocalyptic number.

28340348447 is a deficient number, since it is larger than the sum of its proper divisors (14863129).

28340348447 is a wasteful number, since it uses less digits than its factorization.

28340348447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14863128.

The product of its (nonzero) digits is 2064384, while the sum is 47.

The spelling of 28340348447 in words is "twenty-eight billion, three hundred forty million, three hundred forty-eight thousand, four hundred forty-seven".