28721412079 has 8 divisors (see below), whose sum is σ = 29011452912. Its totient is φ = 28432797120.

The previous prime is 28721412067. The next prime is 28721412103. The reversal of 28721412079 is 97021412782.

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 28721412079 - 2⁹ = 28721411567 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 (28721412179) 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, 315957 + ... + 396574.

It is an arithmetic number, because the mean of its divisors is an integer number (3626431614).

Almost surely, 2^28721412079 is an apocalyptic number.

28721412079 is a deficient number, since it is larger than the sum of its proper divisors (290040833).

28721412079 is a wasteful number, since it uses less digits than its factorization.

28721412079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712937.

The product of its (nonzero) digits is 112896, while the sum is 43.

The spelling of 28721412079 in words is "twenty-eight billion, seven hundred twenty-one million, four hundred twelve thousand, seventy-nine".