28378168 has 64 divisors (see below), whose sum is σ = 69370560. Its totient is φ = 10561536.

The previous prime is 28378139. The next prime is 28378171. The reversal of 28378168 is 86187382.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11230 + ... + 13522.

It is an arithmetic number, because the mean of its divisors is an integer number (1083915).

Almost surely, 2^28378168 is an apocalyptic number.

28378168 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28378168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34685280).

28378168 is an abundant number, since it is smaller than the sum of its proper divisors (40992392).

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

28378168 is a wasteful number, since it uses less digits than its factorization.

28378168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2336 (or 2332 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 28378168 is about 5327.1162930802. The cubic root of 28378168 is about 305.0198607509.

The spelling of 28378168 in words is "twenty-eight million, three hundred seventy-eight thousand, one hundred sixty-eight".