27861963 has 16 divisors (see below), whose sum is σ = 40605696. Its totient is φ = 16917120.

The previous prime is 27861949. The next prime is 27861971. The reversal of 27861963 is 36916872.

It is a happy number.

It is not a de Polignac number, because 27861963 - 2⁵ = 27861931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27861943) 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 15 ways as a sum of consecutive naturals, for example, 7231 + ... + 10392.

It is an arithmetic number, because the mean of its divisors is an integer number (2537856).

Almost surely, 2^27861963 is an apocalyptic number.

27861963 is a deficient number, since it is larger than the sum of its proper divisors (12743733).

27861963 is a wasteful number, since it uses less digits than its factorization.

27861963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17674.

The product of its digits is 108864, while the sum is 42.

The square root of 27861963 is about 5278.4432364098. The cubic root of 27861963 is about 303.1590729828.

The spelling of 27861963 in words is "twenty-seven million, eight hundred sixty-one thousand, nine hundred sixty-three".