28541557 has 8 divisors (see below), whose sum is σ = 31296672. Its totient is φ = 25813200.

The previous prime is 28541533. The next prime is 28541561. The reversal of 28541557 is 75514582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28541557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28541057) 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, 4419 + ... + 8752.

It is an arithmetic number, because the mean of its divisors is an integer number (3912084).

Almost surely, 2^28541557 is an apocalyptic number.

It is an amenable number.

28541557 is a deficient number, since it is larger than the sum of its proper divisors (2755115).

28541557 is a wasteful number, since it uses less digits than its factorization.

28541557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13379.

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

The square root of 28541557 is about 5342.4298778739. The cubic root of 28541557 is about 305.6041308902.

The spelling of 28541557 in words is "twenty-eight million, five hundred forty-one thousand, five hundred fifty-seven".