28439699347 has 8 divisors (see below), whose sum is σ = 30126805200. Its totient is φ = 26754169344.

The previous prime is 28439699311. The next prime is 28439699371. The reversal of 28439699347 is 74399693482.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28439699347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28439699047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356697 + ... + 429082.

It is an arithmetic number, because the mean of its divisors is an integer number (3765850650).

Almost surely, 2^28439699347 is an apocalyptic number.

28439699347 is a deficient number, since it is larger than the sum of its proper divisors (1687105853).

28439699347 is a wasteful number, since it uses less digits than its factorization.

28439699347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 787925.

The product of its digits is 70543872, while the sum is 64.

The spelling of 28439699347 in words is "twenty-eight billion, four hundred thirty-nine million, six hundred ninety-nine thousand, three hundred forty-seven".