27786993 has 16 divisors (see below), whose sum is σ = 42247296. Its totient is φ = 16093440.

The previous prime is 27786991. The next prime is 27787003. The reversal of 27786993 is 39968772.

It is not a de Polignac number, because 27786993 - 2¹ = 27786991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (27786991) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20293 + ... + 21618.

It is an arithmetic number, because the mean of its divisors is an integer number (2640456).

Almost surely, 2^27786993 is an apocalyptic number.

It is an amenable number.

27786993 is a deficient number, since it is larger than the sum of its proper divisors (14460303).

27786993 is a wasteful number, since it uses less digits than its factorization.

27786993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41944.

The product of its digits is 1143072, while the sum is 51.

The square root of 27786993 is about 5271.3369271941. The cubic root of 27786993 is about 302.8869187761.

The spelling of 27786993 in words is "twenty-seven million, seven hundred eighty-six thousand, nine hundred ninety-three".