28934442 has 64 divisors (see below), whose sum is σ = 69759360. Its totient is φ = 8854272.

The previous prime is 28934413. The next prime is 28934453. The reversal of 28934442 is 24443982.

It is a Cunningham number, because it is equal to 307³-1.

It is a junction number, because it is equal to n+sod(n) for n = 28934397 and 28934406.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39108 + ... + 39840.

It is an arithmetic number, because the mean of its divisors is an integer number (1089990).

Almost surely, 2^28934442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28934442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34879680).

28934442 is an abundant number, since it is smaller than the sum of its proper divisors (40824918).

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

28934442 is a wasteful number, since it uses less digits than its factorization.

28934442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 804 (or 798 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 28934442 is about 5379.0744557033. The cubic root of 28934442 is about 306.9999964633. Note that the first 5 decimals are identical.

The spelling of 28934442 in words is "twenty-eight million, nine hundred thirty-four thousand, four hundred forty-two".