28340379647 has 16 divisors (see below), whose sum is σ = 29645214720. Its totient is φ = 27072400608.

The previous prime is 28340379643. The next prime is 28340379649. The reversal of 28340379647 is 74697304382.

It is a cyclic number.

It is not a de Polignac number, because 28340379647 - 2² = 28340379643 is a prime.

It is a super-3 number, since 3×28340379647³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28340379643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301958 + ... + 384524.

It is an arithmetic number, because the mean of its divisors is an integer number (1852825920).

Almost surely, 2^28340379647 is an apocalyptic number.

28340379647 is a deficient number, since it is larger than the sum of its proper divisors (1304835073).

28340379647 is a wasteful number, since it uses less digits than its factorization.

28340379647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82790.

The product of its (nonzero) digits is 6096384, while the sum is 53.

The spelling of 28340379647 in words is "twenty-eight billion, three hundred forty million, three hundred seventy-nine thousand, six hundred forty-seven".