28748442 has 8 divisors (see below), whose sum is σ = 57496896. Its totient is φ = 9582812.

The previous prime is 28748429. The next prime is 28748449. The reversal of 28748442 is 24484782.

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

28748442 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 28748442.

It is not an unprimeable number, because it can be changed into a prime (28748449) 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, 2395698 + ... + 2395709.

It is an arithmetic number, because the mean of its divisors is an integer number (7187112).

Almost surely, 2^28748442 is an apocalyptic number.

28748442 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.

28748442 is a wasteful number, since it uses less digits than its factorization.

28748442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4791412.

The product of its digits is 114688, while the sum is 39.

The square root of 28748442 is about 5361.7573611643. The cubic root of 28748442 is about 306.3407498932.

The spelling of 28748442 in words is "twenty-eight million, seven hundred forty-eight thousand, four hundred forty-two".