27961942 has 4 divisors (see below), whose sum is σ = 41942916. Its totient is φ = 13980970.

The previous prime is 27961937. The next prime is 27962021. The reversal of 27961942 is 24916972.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×27961942² = 1563740400822728, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 27961895 and 27961904.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 6990484 + ... + 6990487.

It is an arithmetic number, because the mean of its divisors is an integer number (10485729).

Almost surely, 2^27961942 is an apocalyptic number.

27961942 is a deficient number, since it is larger than the sum of its proper divisors (13980974).

27961942 is a wasteful number, since it uses less digits than its factorization.

27961942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13980973.

The product of its digits is 54432, while the sum is 40.

The square root of 27961942 is about 5287.9052563373. The cubic root of 27961942 is about 303.5212556369.

The spelling of 27961942 in words is "twenty-seven million, nine hundred sixty-one thousand, nine hundred forty-two".