27993225 has 24 divisors (see below), whose sum is σ = 49844032. Its totient is φ = 13780800.

The previous prime is 27993223. The next prime is 27993263. The reversal of 27993225 is 52239972.

It is not a de Polignac number, because 27993225 - 2¹ = 27993223 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27993223) 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 23 ways as a sum of consecutive naturals, for example, 13381 + ... + 15330.

Almost surely, 2^27993225 is an apocalyptic number.

27993225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

27993225 is a deficient number, since it is larger than the sum of its proper divisors (21850807).

27993225 is a wasteful number, since it uses less digits than its factorization.

27993225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28737 (or 28732 counting only the distinct ones).

The product of its digits is 68040, while the sum is 39.

The square root of 27993225 is about 5290.8624060733. The cubic root of 27993225 is about 303.6344036759.

The spelling of 27993225 in words is "twenty-seven million, nine hundred ninety-three thousand, two hundred twenty-five".