27890977 has 4 divisors (see below), whose sum is σ = 27948736. Its totient is φ = 27833220.

The previous prime is 27890959. The next prime is 27890981. The reversal of 27890977 is 77909872.

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 27890977 - 2¹¹ = 27888929 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27890977.

It is not an unprimeable number, because it can be changed into a prime (27890477) 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 3 ways as a sum of consecutive naturals, for example, 28149 + ... + 29122.

It is an arithmetic number, because the mean of its divisors is an integer number (6987184).

Almost surely, 2^27890977 is an apocalyptic number.

It is an amenable number.

27890977 is a deficient number, since it is larger than the sum of its proper divisors (57759).

27890977 is an equidigital number, since it uses as much as digits as its factorization.

27890977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57758.

The product of its (nonzero) digits is 444528, while the sum is 49.

The square root of 27890977 is about 5281.1908694915. The cubic root of 27890977 is about 303.2642678433.

The spelling of 27890977 in words is "twenty-seven million, eight hundred ninety thousand, nine hundred seventy-seven".