28503741 has 24 divisors (see below), whose sum is σ = 44688000. Its totient is φ = 16111872.

The previous prime is 28503737. The next prime is 28503751. The reversal of 28503741 is 14730582.

It is not a de Polignac number, because 28503741 - 2² = 28503737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28503699 and 28503708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28503701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13260 + ... + 15258.

It is an arithmetic number, because the mean of its divisors is an integer number (1862000).

Almost surely, 2^28503741 is an apocalyptic number.

28503741 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

28503741 is a deficient number, since it is larger than the sum of its proper divisors (16184259).

28503741 is a wasteful number, since it uses less digits than its factorization.

28503741 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2113 (or 2106 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 28503741 is about 5338.8894912706. The cubic root of 28503741 is about 305.4691016580.

The spelling of 28503741 in words is "twenty-eight million, five hundred three thousand, seven hundred forty-one".