28257554 has 16 divisors (see below), whose sum is σ = 47120640. Its totient is φ = 12620880.

The previous prime is 28257527. The next prime is 28257557. The reversal of 28257554 is 45575282.

It is not an unprimeable number, because it can be changed into a prime (28257557) 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, 16724 + ... + 18335.

It is an arithmetic number, because the mean of its divisors is an integer number (2945040).

Almost surely, 2^28257554 is an apocalyptic number.

28257554 is a deficient number, since it is larger than the sum of its proper divisors (18863086).

28257554 is a wasteful number, since it uses less digits than its factorization.

28257554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35105.

The product of its digits is 112000, while the sum is 38.

The square root of 28257554 is about 5315.7834794130. The cubic root of 28257554 is about 304.5871112921.

The spelling of 28257554 in words is "twenty-eight million, two hundred fifty-seven thousand, five hundred fifty-four".