27128740 has 24 divisors (see below), whose sum is σ = 57391992. Its totient is φ = 10771200.

The previous prime is 27128737. The next prime is 27128767. The reversal of 27128740 is 4782172.

It can be written as a sum of positive squares in 4 ways, for example, as 10137856 + 16990884 = 3184^2 + 4122^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211 + ... + 7690.

It is an arithmetic number, because the mean of its divisors is an integer number (2391333).

Almost surely, 2^27128740 is an apocalyptic number.

27128740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

27128740 is an abundant number, since it is smaller than the sum of its proper divisors (30263252).

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

27128740 is a wasteful number, since it uses less digits than its factorization.

27128740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10047 (or 10045 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 27128740 is about 5208.5257031141. The cubic root of 27128740 is about 300.4760589747.

The spelling of 27128740 in words is "twenty-seven million, one hundred twenty-eight thousand, seven hundred forty".