27880101 has 6 divisors (see below), whose sum is σ = 40271270. Its totient is φ = 18586728.

The previous prime is 27880093. The next prime is 27880103. The reversal of 27880101 is 10108872.

It can be written as a sum of positive squares in only one way, i.e., 27815076 + 65025 = 5274^2 + 255^2 .

It is not a de Polignac number, because 27880101 - 2³ = 27880093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27880103) 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, 1548886 + ... + 1548903.

Almost surely, 2^27880101 is an apocalyptic number.

It is an amenable number.

27880101 is a deficient number, since it is larger than the sum of its proper divisors (12391169).

27880101 is a wasteful number, since it uses less digits than its factorization.

27880101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3097795 (or 3097792 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 27880101 is about 5280.1610770885. The cubic root of 27880101 is about 303.2248437314.

Adding to 27880101 its reverse (10108872), we get a palindrome (37988973).

The spelling of 27880101 in words is "twenty-seven million, eight hundred eighty thousand, one hundred one".