28545270731 has 8 divisors (see below), whose sum is σ = 28870153200. Its totient is φ = 28220480640.

The previous prime is 28545270709. The next prime is 28545270773. The reversal of 28545270731 is 13707254582.

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 28545270731 - 2⁶ = 28545270667 is a prime.

It is a super-2 number, since 2×28545270731² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28545272731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741191 + ... + 778751.

It is an arithmetic number, because the mean of its divisors is an integer number (3608769150).

Almost surely, 2^28545270731 is an apocalyptic number.

28545270731 is a deficient number, since it is larger than the sum of its proper divisors (324882469).

28545270731 is an equidigital number, since it uses as much as digits as its factorization.

28545270731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46189.

The product of its (nonzero) digits is 470400, while the sum is 44.

The spelling of 28545270731 in words is "twenty-eight billion, five hundred forty-five million, two hundred seventy thousand, seven hundred thirty-one".