28942503 has 4 divisors (see below), whose sum is σ = 38590008. Its totient is φ = 19295000.

The previous prime is 28942489. The next prime is 28942513. The reversal of 28942503 is 30524982.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28942503 - 2⁵ = 28942471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28942513) 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 3 ways as a sum of consecutive naturals, for example, 4823748 + ... + 4823753.

It is an arithmetic number, because the mean of its divisors is an integer number (9647502).

Almost surely, 2^28942503 is an apocalyptic number.

28942503 is a deficient number, since it is larger than the sum of its proper divisors (9647505).

28942503 is an equidigital number, since it uses as much as digits as its factorization.

28942503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9647504.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 28942503 is about 5379.8236959960. The cubic root of 28942503 is about 307.0285034031.

The spelling of 28942503 in words is "twenty-eight million, nine hundred forty-two thousand, five hundred three".