Search a number

30775 has 6 divisors (see below), whose sum is σ = 38192. Its totient is φ = 24600.

The previous prime is 30773. The next prime is 30781. The reversal of 30775 is 57703.

It is not a de Polignac number, because 30775 - 21 = 30773 is a prime.

It is a Duffinian number.

30775 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 591 + ... + 640.

230775 is an apocalyptic number.

30775 is a deficient number, since it is larger than the sum of its proper divisors (7417).

30775 is a wasteful number, since it uses less digits than its factorization.

30775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 735, while the sum is 22.

The square root of 30775 is about 175.4280479285. The cubic root of 30775 is about 31.3376207603.

The spelling of 30775 in words is "thirty thousand, seven hundred seventy-five".

Divisors: 1 5 25 1231 6155 30775