28445558 has 8 divisors (see below), whose sum is σ = 42751800. Its totient is φ = 14194960.

The previous prime is 28445537. The next prime is 28445623. The reversal of 28445558 is 85554482.

It is a happy number.

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

It is a super-3 number, since 3×28445558³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 12608 + ... + 14691.

It is an arithmetic number, because the mean of its divisors is an integer number (5343975).

Almost surely, 2^28445558 is an apocalyptic number.

28445558 is a deficient number, since it is larger than the sum of its proper divisors (14306242).

28445558 is a wasteful number, since it uses less digits than its factorization.

28445558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27822.

The product of its digits is 256000, while the sum is 41.

The square root of 28445558 is about 5333.4377281450. The cubic root of 28445558 is about 305.2611147422.

The spelling of 28445558 in words is "twenty-eight million, four hundred forty-five thousand, five hundred fifty-eight".