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30827 = 291063
BaseRepresentation
bin111100001101011
31120021202
413201223
51441302
6354415
7155606
oct74153
946252
1030827
1121185
1215a0b
1311054
14b33d
159202
hex786b

30827 has 4 divisors (see below), whose sum is σ = 31920. Its totient is φ = 29736.

The previous prime is 30817. The next prime is 30829. The reversal of 30827 is 72803.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72803 = 471549.

It is a cyclic number.

It is not a de Polignac number, because 30827 - 26 = 30763 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30799 and 30808.

It is not an unprimeable number, because it can be changed into a prime (30829) 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, 503 + ... + 560.

It is an arithmetic number, because the mean of its divisors is an integer number (7980).

230827 is an apocalyptic number.

30827 is a deficient number, since it is larger than the sum of its proper divisors (1093).

30827 is a wasteful number, since it uses less digits than its factorization.

30827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 30827 is about 175.5761942861. The cubic root of 30827 is about 31.3552610455.

The spelling of 30827 in words is "thirty thousand, eight hundred twenty-seven".

Divisors: 1 29 1063 30827