27880997 has 4 divisors (see below), whose sum is σ = 28780416. Its totient is φ = 26981580.

The previous prime is 27880939. The next prime is 27881027. The reversal of 27880997 is 79908872.

It is a happy number.

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 27880997 - 2⁶ = 27880933 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 (27880927) 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, 449663 + ... + 449724.

It is an arithmetic number, because the mean of its divisors is an integer number (7195104).

Almost surely, 2^27880997 is an apocalyptic number.

It is an amenable number.

27880997 is a deficient number, since it is larger than the sum of its proper divisors (899419).

27880997 is an equidigital number, since it uses as much as digits as its factorization.

27880997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 899418.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 27880997 is about 5280.2459223032. The cubic root of 27880997 is about 303.2280920045.

The spelling of 27880997 in words is "twenty-seven million, eight hundred eighty thousand, nine hundred ninety-seven".