27938405 has 8 divisors (see below), whose sum is σ = 36573984. Its totient is φ = 20318800.

The previous prime is 27938401. The next prime is 27938423. The reversal of 27938405 is 50483972.

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

It is not a de Polignac number, because 27938405 - 2² = 27938401 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 (27938401) 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, 253931 + ... + 254040.

It is an arithmetic number, because the mean of its divisors is an integer number (4571748).

Almost surely, 2^27938405 is an apocalyptic number.

It is an amenable number.

27938405 is a deficient number, since it is larger than the sum of its proper divisors (8635579).

27938405 is a wasteful number, since it uses less digits than its factorization.

27938405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 507987.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 27938405 is about 5285.6792373355. The cubic root of 27938405 is about 303.4360685969.

The spelling of 27938405 in words is "twenty-seven million, nine hundred thirty-eight thousand, four hundred five".