28068438 has 8 divisors (see below), whose sum is σ = 56136888. Its totient is φ = 9356144.

The previous prime is 28068431. The next prime is 28068457. The reversal of 28068438 is 83486082.

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

28068438 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28068396 and 28068405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28068431) 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, 2339031 + ... + 2339042.

It is an arithmetic number, because the mean of its divisors is an integer number (7017111).

Almost surely, 2^28068438 is an apocalyptic number.

28068438 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.

28068438 is a wasteful number, since it uses less digits than its factorization.

28068438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4678078.

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 28068438 is about 5297.9654585510. The cubic root of 28068438 is about 303.9060983641.

The spelling of 28068438 in words is "twenty-eight million, sixty-eight thousand, four hundred thirty-eight".