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30005443 = 132434129
BaseRepresentation
bin111001001110…
…1100011000011
32002110102201201
41302131203003
530140133233
62551042031
7513020266
oct162354303
962412651
1030005443
1115a34596
12a070317
1362a7600
143db0cdd
15297a77d
hex1c9d8c3

30005443 has 12 divisors (see below), whose sum is σ = 33254760. Its totient is φ = 27046656.

The previous prime is 30005441. The next prime is 30005447. The reversal of 30005443 is 34450003.

It is not a de Polignac number, because 30005443 - 21 = 30005441 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30005443.

It is not an unprimeable number, because it can be changed into a prime (30005441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5203 + ... + 9331.

It is an arithmetic number, because the mean of its divisors is an integer number (2771230).

Almost surely, 230005443 is an apocalyptic number.

30005443 is a deficient number, since it is larger than the sum of its proper divisors (3249317).

30005443 is a wasteful number, since it uses less digits than its factorization.

30005443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4198 (or 4185 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 30005443 is about 5477.7224281630. The cubic root of 30005443 is about 310.7420413107.

Adding to 30005443 its reverse (34450003), we get a palindrome (64455446).

The spelling of 30005443 in words is "thirty million, five thousand, four hundred forty-three".

Divisors: 1 13 43 169 559 4129 7267 53677 177547 697801 2308111 30005443