27128940 has 48 divisors (see below), whose sum is σ = 80432352. Its totient is φ = 6808576.

The previous prime is 27128939. The next prime is 27128947. The reversal of 27128940 is 4982172.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (27128947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12279 + ... + 14318.

It is an arithmetic number, because the mean of its divisors is an integer number (1675674).

Almost surely, 2^27128940 is an apocalyptic number.

27128940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27128940 is an abundant number, since it is smaller than the sum of its proper divisors (53303412).

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

27128940 is a wasteful number, since it uses less digits than its factorization.

27128940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26626 (or 26624 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 27128940 is about 5208.5449023696. The cubic root of 27128940 is about 300.4767973683.

The spelling of 27128940 in words is "twenty-seven million, one hundred twenty-eight thousand, nine hundred forty".