27897222 has 8 divisors (see below), whose sum is σ = 55794456. Its totient is φ = 9299072.

The previous prime is 27897211. The next prime is 27897251. The reversal of 27897222 is 22279872.

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

27897222 is an admirable number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2324763 + ... + 2324774.

It is an arithmetic number, because the mean of its divisors is an integer number (6974307).

Almost surely, 2^27897222 is an apocalyptic number.

27897222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27897222 is a wasteful number, since it uses less digits than its factorization.

27897222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4649542.

The product of its digits is 56448, while the sum is 39.

The square root of 27897222 is about 5281.7820856222. The cubic root of 27897222 is about 303.2869005393.

It can be divided in two parts, 2789 and 7222, that added together give a triangular number (10011 = T₁₄₁).

The spelling of 27897222 in words is "twenty-seven million, eight hundred ninety-seven thousand, two hundred twenty-two".