27985403 has 4 divisors (see below), whose sum is σ = 28107840. Its totient is φ = 27862968.

The previous prime is 27985393. The next prime is 27985421. The reversal of 27985403 is 30458972.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27985403 - 2⁴ = 27985387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27985453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60875 + ... + 61332.

It is an arithmetic number, because the mean of its divisors is an integer number (7026960).

Almost surely, 2^27985403 is an apocalyptic number.

27985403 is a deficient number, since it is larger than the sum of its proper divisors (122437).

27985403 is a wasteful number, since it uses less digits than its factorization.

27985403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122436.

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

The square root of 27985403 is about 5290.1231554662. The cubic root of 27985403 is about 303.6061200519.

The spelling of 27985403 in words is "twenty-seven million, nine hundred eighty-five thousand, four hundred three".