28545268981 has 8 divisors (see below), whose sum is σ = 28639049760. Its totient is φ = 28451555088.

The previous prime is 28545268979. The next prime is 28545268987. The reversal of 28545268981 is 18986254582.

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 28545268981 - 2¹ = 28545268979 is a prime.

It is a super-2 number, since 2×28545268981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545268987) 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, 924135 + ... + 954523.

It is an arithmetic number, because the mean of its divisors is an integer number (3579881220).

Almost surely, 2^28545268981 is an apocalyptic number.

It is an amenable number.

28545268981 is a deficient number, since it is larger than the sum of its proper divisors (93780779).

28545268981 is a wasteful number, since it uses less digits than its factorization.

28545268981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33443.

The product of its digits is 11059200, while the sum is 58.

The spelling of 28545268981 in words is "twenty-eight billion, five hundred forty-five million, two hundred sixty-eight thousand, nine hundred eighty-one".