28281558 has 8 divisors (see below), whose sum is σ = 56563128. Its totient is φ = 9427184.

The previous prime is 28281553. The next prime is 28281581. The reversal of 28281558 is 85518282.

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

28281558 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28281553) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2356791 + ... + 2356802.

It is an arithmetic number, because the mean of its divisors is an integer number (7070391).

Almost surely, 2^28281558 is an apocalyptic number.

28281558 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28281558 is a wasteful number, since it uses less digits than its factorization.

28281558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4713598.

The product of its digits is 51200, while the sum is 39.

The square root of 28281558 is about 5318.0408046573. The cubic root of 28281558 is about 304.6733329534.

The spelling of 28281558 in words is "twenty-eight million, two hundred eighty-one thousand, five hundred fifty-eight".