28557541 has 8 divisors (see below), whose sum is σ = 29548800. Its totient is φ = 27570720.

The previous prime is 28557539. The next prime is 28557553. The reversal of 28557541 is 14575582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28557541 - 2¹ = 28557539 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28557541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28557511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16830 + ... + 18448.

It is an arithmetic number, because the mean of its divisors is an integer number (3693600).

Almost surely, 2^28557541 is an apocalyptic number.

It is an amenable number.

28557541 is a deficient number, since it is larger than the sum of its proper divisors (991259).

28557541 is a wasteful number, since it uses less digits than its factorization.

28557541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2219.

The product of its digits is 56000, while the sum is 37.

The square root of 28557541 is about 5343.9256169973. The cubic root of 28557541 is about 305.6611689469.

The spelling of 28557541 in words is "twenty-eight million, five hundred fifty-seven thousand, five hundred forty-one".