27878928 has 160 divisors (see below), whose sum is σ = 94755840. Its totient is φ = 6842880.

The previous prime is 27878927. The next prime is 27878941. The reversal of 27878928 is 82987872.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27878923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 70026 + ... + 70422.

It is an arithmetic number, because the mean of its divisors is an integer number (592224).

Almost surely, 2^27878928 is an apocalyptic number.

27878928 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 27878928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47377920).

27878928 is an abundant number, since it is smaller than the sum of its proper divisors (66876912).

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

27878928 is a wasteful number, since it uses less digits than its factorization.

27878928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445 (or 439 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 27878928 is about 5280.0499997633. The cubic root of 27878928 is about 303.2205911436.

The spelling of 27878928 in words is "twenty-seven million, eight hundred seventy-eight thousand, nine hundred twenty-eight".