27780995 has 24 divisors (see below), whose sum is σ = 37461312. Its totient is φ = 19754240.

The previous prime is 27780911. The next prime is 27781001. The reversal of 27780995 is 59908772.

It is not a de Polignac number, because 27780995 - 2¹⁰ = 27779971 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27947 + ... + 28923.

It is an arithmetic number, because the mean of its divisors is an integer number (1560888).

Almost surely, 2^27780995 is an apocalyptic number.

27780995 is a deficient number, since it is larger than the sum of its proper divisors (9680317).

27780995 is a wasteful number, since it uses less digits than its factorization.

27780995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1051 (or 1040 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 47.

The square root of 27780995 is about 5270.7679706092. The cubic root of 27780995 is about 302.8651238488.

The spelling of 27780995 in words is "twenty-seven million, seven hundred eighty thousand, nine hundred ninety-five".