28283818481 has 4 divisors (see below), whose sum is σ = 28309005552. Its totient is φ = 28258631412.

The previous prime is 28283818477. The next prime is 28283818487. The reversal of 28283818481 is 18481838282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28283818481 - 2² = 28283818477 is a prime.

It is a super-2 number, since 2×28283818481² (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 (28283818487) 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 3 ways as a sum of consecutive naturals, for example, 12591851 + ... + 12594096.

It is an arithmetic number, because the mean of its divisors is an integer number (7077251388).

Almost surely, 2^28283818481 is an apocalyptic number.

It is an amenable number.

28283818481 is a deficient number, since it is larger than the sum of its proper divisors (25187071).

28283818481 is a wasteful number, since it uses less digits than its factorization.

28283818481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25187070.

The product of its digits is 1572864, while the sum is 53.

The spelling of 28283818481 in words is "twenty-eight billion, two hundred eighty-three million, eight hundred eighteen thousand, four hundred eighty-one".