28538951617 has 8 divisors (see below), whose sum is σ = 31136922432. Its totient is φ = 25941567600.

The previous prime is 28538951611. The next prime is 28538951621. The reversal of 28538951617 is 71615983582.

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 28538951617 - 2⁷ = 28538951489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28538951611) 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, 41734 + ... + 242527.

It is an arithmetic number, because the mean of its divisors is an integer number (3892115304).

Almost surely, 2^28538951617 is an apocalyptic number.

It is an amenable number.

28538951617 is a deficient number, since it is larger than the sum of its proper divisors (2597970815).

28538951617 is a wasteful number, since it uses less digits than its factorization.

28538951617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293399.

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

The spelling of 28538951617 in words is "twenty-eight billion, five hundred thirty-eight million, nine hundred fifty-one thousand, six hundred seventeen".