28540893 has 8 divisors (see below), whose sum is σ = 38079808. Its totient is φ = 19014624.

The previous prime is 28540849. The next prime is 28540921. The reversal of 28540893 is 39804582.

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 28540893 - 2¹² = 28536797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28540823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5496 + ... + 9342.

It is an arithmetic number, because the mean of its divisors is an integer number (4759976).

Almost surely, 2^28540893 is an apocalyptic number.

It is an amenable number.

28540893 is a deficient number, since it is larger than the sum of its proper divisors (9538915).

28540893 is a wasteful number, since it uses less digits than its factorization.

28540893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6323.

The product of its (nonzero) digits is 69120, while the sum is 39.

The square root of 28540893 is about 5342.3677335054. The cubic root of 28540893 is about 305.6017609807.

The spelling of 28540893 in words is "twenty-eight million, five hundred forty thousand, eight hundred ninety-three".