28334778 has 8 divisors (see below), whose sum is σ = 56669568. Its totient is φ = 9444924.

The previous prime is 28334773. The next prime is 28334783. The reversal of 28334778 is 87743382.

It is an interprime number because it is at equal distance from previous prime (28334773) and next prime (28334783).

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

28334778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (28334771) 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 3 ways as a sum of consecutive naturals, for example, 2361226 + ... + 2361237.

It is an arithmetic number, because the mean of its divisors is an integer number (7083696).

Almost surely, 2^28334778 is an apocalyptic number.

28334778 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.

28334778 is a wasteful number, since it uses less digits than its factorization.

28334778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4722468.

The product of its digits is 225792, while the sum is 42.

The square root of 28334778 is about 5323.0421752979. The cubic root of 28334778 is about 304.8643237809.

The spelling of 28334778 in words is "twenty-eight million, three hundred thirty-four thousand, seven hundred seventy-eight".