27878328 has 24 divisors (see below), whose sum is σ = 75504000. Its totient is φ = 9292752.

The previous prime is 27878321. The next prime is 27878329. The reversal of 27878328 is 82387872.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27878321) 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 5 ways as a sum of consecutive naturals, for example, 193528 + ... + 193671.

It is an arithmetic number, because the mean of its divisors is an integer number (3146000).

Almost surely, 2^27878328 is an apocalyptic number.

It is an amenable number.

27878328 is an abundant number, since it is smaller than the sum of its proper divisors (47625672).

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

27878328 is a wasteful number, since it uses less digits than its factorization.

27878328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387211 (or 387204 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 27878328 is about 5279.9931818138. The cubic root of 27878328 is about 303.2184158608.

It can be divided in two parts, 278 and 78328, that added together give a triangular number (78606 = T₃₉₆).

The spelling of 27878328 in words is "twenty-seven million, eight hundred seventy-eight thousand, three hundred twenty-eight".