28905193 has 8 divisors (see below), whose sum is σ = 29548800. Its totient is φ = 28265328.

The previous prime is 28905187. The next prime is 28905203. The reversal of 28905193 is 39150982.

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 28905193 - 2¹⁷ = 28774121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28905133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19368 + ... + 20806.

It is an arithmetic number, because the mean of its divisors is an integer number (3693600).

Almost surely, 2^28905193 is an apocalyptic number.

It is an amenable number.

28905193 is a deficient number, since it is larger than the sum of its proper divisors (643607).

28905193 is a wasteful number, since it uses less digits than its factorization.

28905193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1871.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 28905193 is about 5376.3549919997. The cubic root of 28905193 is about 306.8965157477.

The spelling of 28905193 in words is "twenty-eight million, nine hundred five thousand, one hundred ninety-three".