28642593 has 8 divisors (see below), whose sum is σ = 43645888. Its totient is φ = 16367184.

The previous prime is 28642591. The next prime is 28642597. The reversal of 28642593 is 39524682.

It is a happy number.

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

It is not a de Polignac number, because 28642593 - 2¹ = 28642591 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28642591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681946 + ... + 681987.

It is an arithmetic number, because the mean of its divisors is an integer number (5455736).

Almost surely, 2^28642593 is an apocalyptic number.

It is an amenable number.

28642593 is a deficient number, since it is larger than the sum of its proper divisors (15003295).

28642593 is a wasteful number, since it uses less digits than its factorization.

28642593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363943.

The product of its digits is 103680, while the sum is 39.

The square root of 28642593 is about 5351.8775210201. The cubic root of 28642593 is about 305.9643151176.

The spelling of 28642593 in words is "twenty-eight million, six hundred forty-two thousand, five hundred ninety-three".