27720443 has 4 divisors (see below), whose sum is σ = 27922920. Its totient is φ = 27517968.

The previous prime is 27720419. The next prime is 27720467. The reversal of 27720443 is 34402772.

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

It is an interprime number because it is at equal distance from previous prime (27720419) and next prime (27720467).

It is a cyclic number.

It is not a de Polignac number, because 27720443 - 2¹² = 27716347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27725443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101033 + ... + 101306.

It is an arithmetic number, because the mean of its divisors is an integer number (6980730).

Almost surely, 2^27720443 is an apocalyptic number.

27720443 is a deficient number, since it is larger than the sum of its proper divisors (202477).

27720443 is a wasteful number, since it uses less digits than its factorization.

27720443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202476.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 27720443 is about 5265.0207027133. The cubic root of 27720443 is about 302.6449202022.

The spelling of 27720443 in words is "twenty-seven million, seven hundred twenty thousand, four hundred forty-three".