28513541 has 6 divisors (see below), whose sum is σ = 33168870. Its totient is φ = 24440136.

The previous prime is 28513531. The next prime is 28513559. The reversal of 28513541 is 14531582.

It can be written as a sum of positive squares in only one way, i.e., 23804641 + 4708900 = 4879^2 + 2170^2 .

It is not a de Polignac number, because 28513541 - 2²² = 24319237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28513501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 290906 + ... + 291003.

It is an arithmetic number, because the mean of its divisors is an integer number (5528145).

Almost surely, 2^28513541 is an apocalyptic number.

It is an amenable number.

28513541 is a deficient number, since it is larger than the sum of its proper divisors (4655329).

28513541 is an equidigital number, since it uses as much as digits as its factorization.

28513541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581923 (or 581916 counting only the distinct ones).

The product of its digits is 4800, while the sum is 29.

The square root of 28513541 is about 5339.8072062575. The cubic root of 28513541 is about 305.5041058840.

The spelling of 28513541 in words is "twenty-eight million, five hundred thirteen thousand, five hundred forty-one".