28772752639 has 8 divisors (see below), whose sum is σ = 29339754912. Its totient is φ = 28211282400.

The previous prime is 28772752621. The next prime is 28772752643. The reversal of 28772752639 is 93625727782.

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 28772752639 - 2⁷ = 28772752511 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 (28772752699) 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, 1372504 + ... + 1393309.

It is an arithmetic number, because the mean of its divisors is an integer number (3667469364).

Almost surely, 2^28772752639 is an apocalyptic number.

28772752639 is a deficient number, since it is larger than the sum of its proper divisors (567002273).

28772752639 is a wasteful number, since it uses less digits than its factorization.

28772752639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2766017.

The product of its digits is 17781120, while the sum is 58.

The spelling of 28772752639 in words is "twenty-eight billion, seven hundred seventy-two million, seven hundred fifty-two thousand, six hundred thirty-nine".