27961885 has 8 divisors (see below), whose sum is σ = 38347776. Its totient is φ = 19173840.

The previous prime is 27961883. The next prime is 27961891. The reversal of 27961885 is 58816972.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 27961885 - 2¹ = 27961883 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 (27961883) 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 7 ways as a sum of consecutive naturals, for example, 399421 + ... + 399490.

It is an arithmetic number, because the mean of its divisors is an integer number (4793472).

Almost surely, 2^27961885 is an apocalyptic number.

It is an amenable number.

27961885 is a deficient number, since it is larger than the sum of its proper divisors (10385891).

27961885 is an equidigital number, since it uses as much as digits as its factorization.

27961885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798923.

The product of its digits is 241920, while the sum is 46.

The square root of 27961885 is about 5287.8998666768. The cubic root of 27961885 is about 303.5210493956.

Adding to 27961885 its product of digits (241920), we get a triangular number (28203805 = T₇₅₁₀).

The spelling of 27961885 in words is "twenty-seven million, nine hundred sixty-one thousand, eight hundred eighty-five".