27398890 has 16 divisors (see below), whose sum is σ = 49432032. Its totient is φ = 10934224.

The previous prime is 27398887. The next prime is 27398897. The reversal of 27398890 is 9889372.

It is a self number, because there is not a number n which added to its sum of digits gives 27398890.

It is not an unprimeable number, because it can be changed into a prime (27398897) 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 7 ways as a sum of consecutive naturals, for example, 1737 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (3089502).

Almost surely, 2^27398890 is an apocalyptic number.

27398890 is a deficient number, since it is larger than the sum of its proper divisors (22033142).

27398890 is a wasteful number, since it uses less digits than its factorization.

27398890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6341.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 27398890 is about 5234.3949029472. The cubic root of 27398890 is about 301.4701540916.

The spelling of 27398890 in words is "twenty-seven million, three hundred ninety-eight thousand, eight hundred ninety".