28955913 has 24 divisors (see below), whose sum is σ = 47557152. Its totient is φ = 15571584.

The previous prime is 28955903. The next prime is 28955921. The reversal of 28955913 is 31955982.

It is not a de Polignac number, because 28955913 - 2⁴ = 28955897 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28955903) 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 23 ways as a sum of consecutive naturals, for example, 3295 + ... + 8292.

It is an arithmetic number, because the mean of its divisors is an integer number (1981548).

Almost surely, 2^28955913 is an apocalyptic number.

It is an amenable number.

28955913 is a deficient number, since it is larger than the sum of its proper divisors (18601239).

28955913 is a wasteful number, since it uses less digits than its factorization.

28955913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11621 (or 11614 counting only the distinct ones).

The product of its digits is 97200, while the sum is 42.

The square root of 28955913 is about 5381.0698750341. The cubic root of 28955913 is about 307.0759148348.

The spelling of 28955913 in words is "twenty-eight million, nine hundred fifty-five thousand, nine hundred thirteen".