28503873 has 16 divisors (see below), whose sum is σ = 42825600. Its totient is φ = 18733680.

The previous prime is 28503869. The next prime is 28503889. The reversal of 28503873 is 37830582.

It is not a de Polignac number, because 28503873 - 2² = 28503869 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28503823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5518 + ... + 9351.

It is an arithmetic number, because the mean of its divisors is an integer number (2676600).

Almost surely, 2^28503873 is an apocalyptic number.

It is an amenable number.

28503873 is a deficient number, since it is larger than the sum of its proper divisors (14321727).

28503873 is a wasteful number, since it uses less digits than its factorization.

28503873 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14949 (or 14943 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 28503873 is about 5338.9018533777. The cubic root of 28503873 is about 305.4695731968.

The spelling of 28503873 in words is "twenty-eight million, five hundred three thousand, eight hundred seventy-three".