28972617835 has 48 divisors (see below), whose sum is σ = 40808731392. Its totient is φ = 19688356800.

The previous prime is 28972617833. The next prime is 28972617841. The reversal of 28972617835 is 53871627982.

It is a happy number.

It is not a de Polignac number, because 28972617835 - 2¹ = 28972617833 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28972617835.

It is not an unprimeable number, because it can be changed into a prime (28972617833) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13594720 + ... + 13596850.

It is an arithmetic number, because the mean of its divisors is an integer number (850181904).

Almost surely, 2^28972617835 is an apocalyptic number.

28972617835 is a deficient number, since it is larger than the sum of its proper divisors (11836113557).

28972617835 is a wasteful number, since it uses less digits than its factorization.

28972617835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2624 (or 2617 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 58.

The spelling of 28972617835 in words is "twenty-eight billion, nine hundred seventy-two million, six hundred seventeen thousand, eight hundred thirty-five".