28540003 has 8 divisors (see below), whose sum is σ = 29481408. Its totient is φ = 27611304.

The previous prime is 28539989. The next prime is 28540021. The reversal of 28540003 is 30004582.

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 28540003 - 2¹⁷ = 28408931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28540063) 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, 1500 + ... + 7702.

It is an arithmetic number, because the mean of its divisors is an integer number (3685176).

Almost surely, 2^28540003 is an apocalyptic number.

28540003 is a deficient number, since it is larger than the sum of its proper divisors (941405).

28540003 is a wasteful number, since it uses less digits than its factorization.

28540003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6353.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 28540003 is about 5342.2844364560. The cubic root of 28540003 is about 305.5985843878.

Adding to 28540003 its reverse (30004582), we get a palindrome (58544585).

The spelling of 28540003 in words is "twenty-eight million, five hundred forty thousand, three".