27915140 has 48 divisors (see below), whose sum is σ = 64350720. Its totient is φ = 10087680.

The previous prime is 27915119. The next prime is 27915143. The reversal of 27915140 is 4151972.

It is not an unprimeable number, because it can be changed into a prime (27915143) 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 15 ways as a sum of consecutive naturals, for example, 48776 + ... + 49344.

It is an arithmetic number, because the mean of its divisors is an integer number (1340640).

Almost surely, 2^27915140 is an apocalyptic number.

27915140 is a gapful number since it is divisible by the number (20) 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 27915140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32175360).

27915140 is an abundant number, since it is smaller than the sum of its proper divisors (36435580).

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

27915140 is a wasteful number, since it uses less digits than its factorization.

27915140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 27915140 is about 5283.4780211524. The cubic root of 27915140 is about 303.3518189703.

The spelling of 27915140 in words is "twenty-seven million, nine hundred fifteen thousand, one hundred forty".