28839342 has 48 divisors (see below), whose sum is σ = 67543632. Its totient is φ = 8184960.

The previous prime is 28839323. The next prime is 28839347. The reversal of 28839342 is 24393882.

It is a self number, because there is not a number n which added to its sum of digits gives 28839342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28839347) 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 23 ways as a sum of consecutive naturals, for example, 68292 + ... + 68712.

It is an arithmetic number, because the mean of its divisors is an integer number (1407159).

Almost surely, 2^28839342 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28839342, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33771816).

28839342 is an abundant number, since it is smaller than the sum of its proper divisors (38704290).

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

28839342 is a wasteful number, since it uses less digits than its factorization.

28839342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673 (or 666 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 28839342 is about 5370.2273694882. The cubic root of 28839342 is about 306.6632841992.

The spelling of 28839342 in words is "twenty-eight million, eight hundred thirty-nine thousand, three hundred forty-two".