27790043 has 4 divisors (see below), whose sum is σ = 28686528. Its totient is φ = 26893560.

The previous prime is 27790001. The next prime is 27790093. The reversal of 27790043 is 34009772.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 27790043 - 2⁸ = 27789787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27789991 and 27790009.

It is not an unprimeable number, because it can be changed into a prime (27790093) 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, 448196 + ... + 448257.

It is an arithmetic number, because the mean of its divisors is an integer number (7171632).

Almost surely, 2^27790043 is an apocalyptic number.

27790043 is a deficient number, since it is larger than the sum of its proper divisors (896485).

27790043 is an equidigital number, since it uses as much as digits as its factorization.

27790043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 896484.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 27790043 is about 5271.6262196783. The cubic root of 27790043 is about 302.8980003554.

The spelling of 27790043 in words is "twenty-seven million, seven hundred ninety thousand, forty-three".