Search a number
-
+
30644 = 2247163
BaseRepresentation
bin111011110110100
31120000222
413132310
51440034
6353512
7155225
oct73664
946028
1030644
1121029
1215898
1310c43
14b24c
15912e
hex77b4

30644 has 12 divisors (see below), whose sum is σ = 55104. Its totient is φ = 14904.

The previous prime is 30643. The next prime is 30649. The reversal of 30644 is 44603.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 30644.

It is not an unprimeable number, because it can be changed into a prime (30643) 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, 107 + ... + 269.

It is an arithmetic number, because the mean of its divisors is an integer number (4592).

230644 is an apocalyptic number.

It is an amenable number.

30644 is a deficient number, since it is larger than the sum of its proper divisors (24460).

30644 is a wasteful number, since it uses less digits than its factorization.

30644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 30644 is about 175.0542772971. The cubic root of 30644 is about 31.2930925497.

The spelling of 30644 in words is "thirty thousand, six hundred forty-four".

Divisors: 1 2 4 47 94 163 188 326 652 7661 15322 30644