28557554 has 8 divisors (see below), whose sum is σ = 42867948. Its totient is φ = 14268240.

The previous prime is 28557553. The next prime is 28557643. The reversal of 28557554 is 45575582.

It can be written as a sum of positive squares in 2 ways, for example, as 28376929 + 180625 = 5327^2 + 425^2 .

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

It is not an unprimeable number, because it can be changed into a prime (28557553) 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 3 ways as a sum of consecutive naturals, for example, 1277 + ... + 7664.

Almost surely, 2^28557554 is an apocalyptic number.

28557554 is a deficient number, since it is larger than the sum of its proper divisors (14310394).

28557554 is a wasteful number, since it uses less digits than its factorization.

28557554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10540.

The product of its digits is 280000, while the sum is 41.

The square root of 28557554 is about 5343.9268333315. The cubic root of 28557554 is about 305.6612153281.

The spelling of 28557554 in words is "twenty-eight million, five hundred fifty-seven thousand, five hundred fifty-four".