27956145 has 32 divisors (see below), whose sum is σ = 52888320. Its totient is φ = 12337920.

The previous prime is 27956119. The next prime is 27956161. The reversal of 27956145 is 54165972.

It is not a de Polignac number, because 27956145 - 2⁶ = 27956081 is a prime.

It is a super-2 number, since 2×27956145² = 1563092086522050, which contains 22 as substring.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1546 + ... + 7635.

It is an arithmetic number, because the mean of its divisors is an integer number (1652760).

Almost surely, 2^27956145 is an apocalyptic number.

It is an amenable number.

27956145 is a deficient number, since it is larger than the sum of its proper divisors (24932175).

27956145 is a wasteful number, since it uses less digits than its factorization.

27956145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9225.

The product of its digits is 75600, while the sum is 39.

The square root of 27956145 is about 5287.3570902673. The cubic root of 27956145 is about 303.5002790976.

The spelling of 27956145 in words is "twenty-seven million, nine hundred fifty-six thousand, one hundred forty-five".