30788 has 12 divisors (see below), whose sum is σ = 55440. Its totient is φ = 14952.

The previous prime is 30781. The next prime is 30803. The reversal of 30788 is 88703.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (30781) by changing a digit.

30788 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 261.

It is an arithmetic number, because the mean of its divisors is an integer number (4620).

2³⁰⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

30788 is a deficient number, since it is larger than the sum of its proper divisors (24652).

30788 is a wasteful number, since it uses less digits than its factorization.

30788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226 (or 224 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 30788 is about 175.4650962442. The cubic root of 30788 is about 31.3420326934.

It can be divided in two parts, 30 and 788, that added together give a palindrome (818).

The spelling of 30788 in words is "thirty thousand, seven hundred eighty-eight".