27921794 has 4 divisors (see below), whose sum is σ = 41882694. Its totient is φ = 13960896.

The previous prime is 27921763. The next prime is 27921799. The reversal of 27921794 is 49712972.

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., 22800625 + 5121169 = 4775^2 + 2263^2 .

It is not an unprimeable number, because it can be changed into a prime (27921799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6980447 + ... + 6980450.

Almost surely, 2^27921794 is an apocalyptic number.

27921794 is a deficient number, since it is larger than the sum of its proper divisors (13960900).

27921794 is a wasteful number, since it uses less digits than its factorization.

27921794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13960899.

The product of its digits is 63504, while the sum is 41.

The square root of 27921794 is about 5284.1076824758. The cubic root of 27921794 is about 303.3759199020.

The spelling of 27921794 in words is "twenty-seven million, nine hundred twenty-one thousand, seven hundred ninety-four".