27800913 has 16 divisors (see below), whose sum is σ = 42997760. Its totient is φ = 15648336.

The previous prime is 27800909. The next prime is 27800921. The reversal of 27800913 is 31900872.

It is a happy number.

It is not a de Polignac number, because 27800913 - 2² = 27800909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27800963) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8473 + ... + 11286.

It is an arithmetic number, because the mean of its divisors is an integer number (2687360).

Almost surely, 2^27800913 is an apocalyptic number.

It is an amenable number.

27800913 is a deficient number, since it is larger than the sum of its proper divisors (15196847).

27800913 is a wasteful number, since it uses less digits than its factorization.

27800913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19836.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 27800913 is about 5272.6571100347. The cubic root of 27800913 is about 302.9374877847.

The spelling of 27800913 in words is "twenty-seven million, eight hundred thousand, nine hundred thirteen".