28417557 has 16 divisors (see below), whose sum is σ = 45850752. Its totient is φ = 15283200.

The previous prime is 28417549. The next prime is 28417561. The reversal of 28417557 is 75571482.

It is not a de Polignac number, because 28417557 - 2³ = 28417549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28417757) 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 15 ways as a sum of consecutive naturals, for example, 39444 + ... + 40157.

It is an arithmetic number, because the mean of its divisors is an integer number (2865672).

Almost surely, 2^28417557 is an apocalyptic number.

It is an amenable number.

28417557 is a deficient number, since it is larger than the sum of its proper divisors (17433195).

28417557 is a wasteful number, since it uses less digits than its factorization.

28417557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79628.

The product of its digits is 78400, while the sum is 39.

The square root of 28417557 is about 5330.8120394552. The cubic root of 28417557 is about 305.1609183988.

The spelling of 28417557 in words is "twenty-eight million, four hundred seventeen thousand, five hundred fifty-seven".