Search a number
-
+
27968801 = 73995543
BaseRepresentation
bin110101010110…
…0010100100001
31221121221222112
41222230110201
524130000201
62435245105
7456505460
oct152542441
957557875
1027968801
1114873413
129449795
135a435b3
143a009d7
1526c70bb
hex1aac521

27968801 has 4 divisors (see below), whose sum is σ = 31964352. Its totient is φ = 23973252.

The previous prime is 27968767. The next prime is 27968803. The reversal of 27968801 is 10886972.

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 27968801 - 214 = 27952417 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27968803) 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, 1997765 + ... + 1997778.

It is an arithmetic number, because the mean of its divisors is an integer number (7991088).

Almost surely, 227968801 is an apocalyptic number.

It is an amenable number.

27968801 is a deficient number, since it is larger than the sum of its proper divisors (3995551).

27968801 is an equidigital number, since it uses as much as digits as its factorization.

27968801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3995550.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 27968801 is about 5288.5537720628. The cubic root of 27968801 is about 303.5460712964.

The spelling of 27968801 in words is "twenty-seven million, nine hundred sixty-eight thousand, eight hundred one".

Divisors: 1 7 3995543 27968801