28951193 has 8 divisors (see below), whose sum is σ = 31526400. Its totient is φ = 26481168.

The previous prime is 28951177. The next prime is 28951199. The reversal of 28951193 is 39115982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28951193 - 2⁴ = 28951177 is a prime.

It is a super-2 number, since 2×28951193² = 1676343152246498, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28951199) 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 7 ways as a sum of consecutive naturals, for example, 25721 + ... + 26822.

It is an arithmetic number, because the mean of its divisors is an integer number (3940800).

Almost surely, 2^28951193 is an apocalyptic number.

It is an amenable number.

28951193 is a deficient number, since it is larger than the sum of its proper divisors (2575207).

28951193 is a wasteful number, since it uses less digits than its factorization.

28951193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52591.

The product of its digits is 19440, while the sum is 38.

The square root of 28951193 is about 5380.6312826656. The cubic root of 28951193 is about 307.0592288119.

The spelling of 28951193 in words is "twenty-eight million, nine hundred fifty-one thousand, one hundred ninety-three".