28558442 has 8 divisors (see below), whose sum is σ = 46732032. Its totient is φ = 12981100.

The previous prime is 28558441. The next prime is 28558477. The reversal of 28558442 is 24485582.

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

It is a junction number, because it is equal to n+sod(n) for n = 28558396 and 28558405.

It is not an unprimeable number, because it can be changed into a prime (28558441) 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, 649034 + ... + 649077.

It is an arithmetic number, because the mean of its divisors is an integer number (5841504).

Almost surely, 2^28558442 is an apocalyptic number.

28558442 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28558442 is a deficient number, since it is larger than the sum of its proper divisors (18173590).

28558442 is a wasteful number, since it uses less digits than its factorization.

28558442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1298124.

The product of its digits is 102400, while the sum is 38.

The square root of 28558442 is about 5344.0099176555. The cubic root of 28558442 is about 305.6643834840.

The spelling of 28558442 in words is "twenty-eight million, five hundred fifty-eight thousand, four hundred forty-two".