28989442 has 8 divisors (see below), whose sum is σ = 44096832. Its totient is φ = 14290500.

The previous prime is 28989427. The next prime is 28989451. The reversal of 28989442 is 24498982.

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 = 28989392 and 28989401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101934 + ... + 102217.

It is an arithmetic number, because the mean of its divisors is an integer number (5512104).

Almost surely, 2^28989442 is an apocalyptic number.

28989442 is a deficient number, since it is larger than the sum of its proper divisors (15107390).

28989442 is a wasteful number, since it uses less digits than its factorization.

28989442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204224.

The product of its digits is 331776, while the sum is 46.

The square root of 28989442 is about 5384.1844322051. The cubic root of 28989442 is about 307.1943935360.

The spelling of 28989442 in words is "twenty-eight million, nine hundred eighty-nine thousand, four hundred forty-two".