27801943 has 8 divisors (see below), whose sum is σ = 29988000. Its totient is φ = 25622688.

The previous prime is 27801941. The next prime is 27801973. The reversal of 27801943 is 34910872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27801943 - 2¹ = 27801941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27801899 and 27801908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27801941) 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 7 ways as a sum of consecutive naturals, for example, 9633 + ... + 12181.

It is an arithmetic number, because the mean of its divisors is an integer number (3748500).

Almost surely, 2^27801943 is an apocalyptic number.

27801943 is a deficient number, since it is larger than the sum of its proper divisors (2186057).

27801943 is a wasteful number, since it uses less digits than its factorization.

27801943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 27801943 is about 5272.7547828436. The cubic root of 27801943 is about 302.9412289299.

The spelling of 27801943 in words is "twenty-seven million, eight hundred one thousand, nine hundred forty-three".