28315541 has 2 divisors, whose sum is σ = 28315542. Its totient is φ = 28315540.

The previous prime is 28315537. The next prime is 28315579. The reversal of 28315541 is 14551382.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28313041 + 2500 = 5321^2 + 50^2 .

It is a cyclic number.

It is not a de Polignac number, because 28315541 - 2² = 28315537 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28315141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14157770 + 14157771.

It is an arithmetic number, because the mean of its divisors is an integer number (14157771).

Almost surely, 2^28315541 is an apocalyptic number.

It is an amenable number.

28315541 is a deficient number, since it is larger than the sum of its proper divisors (1).

28315541 is an equidigital number, since it uses as much as digits as its factorization.

28315541 is an evil number, because the sum of its binary digits is even.

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

The square root of 28315541 is about 5321.2349130629. The cubic root of 28315541 is about 304.7953155029.

The spelling of 28315541 in words is "twenty-eight million, three hundred fifteen thousand, five hundred forty-one".