28273415481 has 24 divisors (see below), whose sum is σ = 43002180000. Its totient is φ = 17851344192.

The previous prime is 28273415477. The next prime is 28273415543. The reversal of 28273415481 is 18451437282.

It is not a de Polignac number, because 28273415481 - 2² = 28273415477 is a prime.

It is a super-2 number, since 2×28273415481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28273415281) 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 23 ways as a sum of consecutive naturals, for example, 565810 + ... + 613748.

It is an arithmetic number, because the mean of its divisors is an integer number (1791757500).

Almost surely, 2^28273415481 is an apocalyptic number.

It is an amenable number.

28273415481 is a deficient number, since it is larger than the sum of its proper divisors (14728764519).

28273415481 is a wasteful number, since it uses less digits than its factorization.

28273415481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51413 (or 51410 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The spelling of 28273415481 in words is "twenty-eight billion, two hundred seventy-three million, four hundred fifteen thousand, four hundred eighty-one".