28833913 has 4 divisors (see below), whose sum is σ = 28869120. Its totient is φ = 28798708.

The previous prime is 28833911. The next prime is 28833943. The reversal of 28833913 is 31933882.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31933882 = 2 ⋅15966941.

It is a cyclic number.

It is not a de Polignac number, because 28833913 - 2¹ = 28833911 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28833911) 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 3 ways as a sum of consecutive naturals, for example, 16345 + ... + 18022.

It is an arithmetic number, because the mean of its divisors is an integer number (7217280).

Almost surely, 2^28833913 is an apocalyptic number.

It is an amenable number.

28833913 is a deficient number, since it is larger than the sum of its proper divisors (35207).

28833913 is an equidigital number, since it uses as much as digits as its factorization.

28833913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35206.

The product of its digits is 31104, while the sum is 37.

The square root of 28833913 is about 5369.7218736169. The cubic root of 28833913 is about 306.6440398922.

The spelling of 28833913 in words is "twenty-eight million, eight hundred thirty-three thousand, nine hundred thirteen".