28439879983 has 8 divisors (see below), whose sum is σ = 29982341088. Its totient is φ = 26922914304.

The previous prime is 28439879959. The next prime is 28439880011. The reversal of 28439879983 is 38997893482.

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

It is a cyclic number.

It is not a de Polignac number, because 28439879983 - 2²¹ = 28437782831 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 (28439879903) 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, 6371566 + ... + 6376027.

It is an arithmetic number, because the mean of its divisors is an integer number (3747792636).

Almost surely, 2^28439879983 is an apocalyptic number.

28439879983 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28439879983 is a deficient number, since it is larger than the sum of its proper divisors (1542461105).

28439879983 is a wasteful number, since it uses less digits than its factorization.

28439879983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12747713.

The product of its digits is 188116992, while the sum is 70.

The spelling of 28439879983 in words is "twenty-eight billion, four hundred thirty-nine million, eight hundred seventy-nine thousand, nine hundred eighty-three".