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30818093 = 172106637
BaseRepresentation
bin111010110001…
…1111100101101
32010222201110212
41311203330231
530342134333
63020312205
7522643445
oct165437455
963881425
1030818093
111643a0a9
12a3a2665
136500477
144143125
152a8b448
hex1d63f2d

30818093 has 6 divisors (see below), whose sum is σ = 32737866. Its totient is φ = 29004992.

The previous prime is 30818083. The next prime is 30818131. The reversal of 30818093 is 39081803.

It can be written as a sum of positive squares in 3 ways, for example, as 22448644 + 8369449 = 4738^2 + 2893^2 .

It is not a de Polignac number, because 30818093 - 224 = 14040877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30818023) 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, 53030 + ... + 53607.

It is an arithmetic number, because the mean of its divisors is an integer number (5456311).

Almost surely, 230818093 is an apocalyptic number.

It is an amenable number.

30818093 is a deficient number, since it is larger than the sum of its proper divisors (1919773).

30818093 is a wasteful number, since it uses less digits than its factorization.

30818093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106671 (or 106654 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 30818093 is about 5551.4045970367. The cubic root of 30818093 is about 313.5224087690.

Adding to 30818093 its reverse (39081803), we get a palindrome (69899896).

The spelling of 30818093 in words is "thirty million, eight hundred eighteen thousand, ninety-three".

Divisors: 1 17 289 106637 1812829 30818093