28503365 has 16 divisors (see below), whose sum is σ = 37630656. Its totient is φ = 20724880.

The previous prime is 28503331. The next prime is 28503383. The reversal of 28503365 is 56330582.

It is not a de Polignac number, because 28503365 - 2⁶ = 28503301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4514 + ... + 8796.

It is an arithmetic number, because the mean of its divisors is an integer number (2351916).

Almost surely, 2^28503365 is an apocalyptic number.

It is an amenable number.

28503365 is a deficient number, since it is larger than the sum of its proper divisors (9127291).

28503365 is an equidigital number, since it uses as much as digits as its factorization.

28503365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4321 (or 4299 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 28503365 is about 5338.8542778390. The cubic root of 28503365 is about 305.4677584789.

The spelling of 28503365 in words is "twenty-eight million, five hundred three thousand, three hundred sixty-five".