27939946 has 4 divisors (see below), whose sum is σ = 41909922. Its totient is φ = 13969972.

The previous prime is 27939943. The next prime is 27939971. The reversal of 27939946 is 64993972.

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

It can be written as a sum of positive squares in only one way, i.e., 24117921 + 3822025 = 4911^2 + 1955^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 27939946.

It is not an unprimeable number, because it can be changed into a prime (27939943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6984985 + ... + 6984988.

Almost surely, 2^27939946 is an apocalyptic number.

27939946 is a deficient number, since it is larger than the sum of its proper divisors (13969976).

27939946 is a wasteful number, since it uses less digits than its factorization.

27939946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13969975.

The product of its digits is 734832, while the sum is 49.

The square root of 27939946 is about 5285.8250065624. The cubic root of 27939946 is about 303.4416473738.

The spelling of 27939946 in words is "twenty-seven million, nine hundred thirty-nine thousand, nine hundred forty-six".