28881683 has 4 divisors (see below), whose sum is σ = 29033088. Its totient is φ = 28730280.

The previous prime is 28881679. The next prime is 28881703. The reversal of 28881683 is 38618882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38618882 = 2 ⋅19309441.

It is a cyclic number.

It is not a de Polignac number, because 28881683 - 2² = 28881679 is a prime.

It is a super-2 number, since 2×28881683² = 1668303225824978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28881673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75416 + ... + 75797.

It is an arithmetic number, because the mean of its divisors is an integer number (7258272).

Almost surely, 2^28881683 is an apocalyptic number.

28881683 is a deficient number, since it is larger than the sum of its proper divisors (151405).

28881683 is a wasteful number, since it uses less digits than its factorization.

28881683 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151404.

The product of its digits is 147456, while the sum is 44.

The square root of 28881683 is about 5374.1681216724. The cubic root of 28881683 is about 306.8132885561.

The spelling of 28881683 in words is "twenty-eight million, eight hundred eighty-one thousand, six hundred eighty-three".