28531273386 has 32 divisors (see below), whose sum is σ = 71142916608. Its totient is φ = 7410720240.

The previous prime is 28531273369. The next prime is 28531273387. The reversal of 28531273386 is 68337213582.

It is a super-2 number, since 2×28531273386² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28531273387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30877540 + ... + 30878463.

It is an arithmetic number, because the mean of its divisors is an integer number (2223216144).

Almost surely, 2^28531273386 is an apocalyptic number.

28531273386 is an abundant number, since it is smaller than the sum of its proper divisors (42611643222).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28531273386 is a wasteful number, since it uses less digits than its factorization.

28531273386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61756026.

The product of its digits is 1451520, while the sum is 48.

The spelling of 28531273386 in words is "twenty-eight billion, five hundred thirty-one million, two hundred seventy-three thousand, three hundred eighty-six".