27921946 has 8 divisors (see below), whose sum is σ = 45104724. Its totient is φ = 12887040.

The previous prime is 27921923. The next prime is 27921967. The reversal of 27921946 is 64912972.

It can be written as a sum of positive squares in 2 ways, for example, as 27092025 + 829921 = 5205^2 + 911^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 27921899 and 27921908.

It is an unprimeable number.

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, 536935 + ... + 536986.

Almost surely, 2^27921946 is an apocalyptic number.

27921946 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

27921946 is a deficient number, since it is larger than the sum of its proper divisors (17182778).

27921946 is a wasteful number, since it uses less digits than its factorization.

27921946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1073936.

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

The square root of 27921946 is about 5284.1220652063. The cubic root of 27921946 is about 303.3764704045.

The spelling of 27921946 in words is "twenty-seven million, nine hundred twenty-one thousand, nine hundred forty-six".