28615731589 has 8 divisors (see below), whose sum is σ = 29861819712. Its totient is φ = 27369804000.

The previous prime is 28615731581. The next prime is 28615731631. The reversal of 28615731589 is 98513751682.

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 28615731589 - 2³ = 28615731581 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 (28615731581) 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, 453402 + ... + 512644.

It is an arithmetic number, because the mean of its divisors is an integer number (3732727464).

Almost surely, 2^28615731589 is an apocalyptic number.

It is an amenable number.

28615731589 is a deficient number, since it is larger than the sum of its proper divisors (1246088123).

28615731589 is a wasteful number, since it uses less digits than its factorization.

28615731589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80267.

The product of its digits is 3628800, while the sum is 55.

The spelling of 28615731589 in words is "twenty-eight billion, six hundred fifteen million, seven hundred thirty-one thousand, five hundred eighty-nine".