27866398 has 24 divisors (see below), whose sum is σ = 48923784. Its totient is φ = 11869200.

The previous prime is 27866389. The next prime is 27866413. The reversal of 27866398 is 89366872.

It is a super-2 number, since 2×27866398² = 1553072274988808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 11 ways as a sum of consecutive naturals, for example, 16953 + ... + 18523.

It is an arithmetic number, because the mean of its divisors is an integer number (2038491).

Almost surely, 2^27866398 is an apocalyptic number.

27866398 is a deficient number, since it is larger than the sum of its proper divisors (21057386).

27866398 is a wasteful number, since it uses less digits than its factorization.

27866398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1768 (or 1761 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 27866398 is about 5278.8633246183. The cubic root of 27866398 is about 303.1751575059.

The spelling of 27866398 in words is "twenty-seven million, eight hundred sixty-six thousand, three hundred ninety-eight".