27780983 has 4 divisors (see below), whose sum is σ = 29243160. Its totient is φ = 26318808.

The previous prime is 27780911. The next prime is 27781001. The reversal of 27780983 is 38908772.

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 27780983 - 2¹⁰ = 27779959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27780583) 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, 731060 + ... + 731097.

It is an arithmetic number, because the mean of its divisors is an integer number (7310790).

Almost surely, 2^27780983 is an apocalyptic number.

27780983 is a deficient number, since it is larger than the sum of its proper divisors (1462177).

27780983 is a wasteful number, since it uses less digits than its factorization.

27780983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1462176.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 27780983 is about 5270.7668322551. The cubic root of 27780983 is about 302.8650802413.

The spelling of 27780983 in words is "twenty-seven million, seven hundred eighty thousand, nine hundred eighty-three".