27890293 has 4 divisors (see below), whose sum is σ = 28103328. Its totient is φ = 27677260.

The previous prime is 27890287. The next prime is 27890311. The reversal of 27890293 is 39209872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27890293 - 2⁹ = 27889781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27890263) by changing a digit.

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, 106321 + ... + 106582.

It is an arithmetic number, because the mean of its divisors is an integer number (7025832).

Almost surely, 2^27890293 is an apocalyptic number.

It is an amenable number.

27890293 is a deficient number, since it is larger than the sum of its proper divisors (213035).

27890293 is a wasteful number, since it uses less digits than its factorization.

27890293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213034.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 27890293 is about 5281.1261109729. The cubic root of 27890293 is about 303.2617887326.

The spelling of 27890293 in words is "twenty-seven million, eight hundred ninety thousand, two hundred ninety-three".