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30000385 = 553113209
BaseRepresentation
bin111001001110…
…0010100000001
32002110011210101
41302130110001
530140003020
62551002401
7512666452
oct162342401
962404711
1030000385
1115a30808
12a069401
1362a520c
143dad129
15297900a
hex1c9c501

30000385 has 8 divisors (see below), whose sum is σ = 36680040. Its totient is φ = 23547264.

The previous prime is 30000367. The next prime is 30000401. The reversal of 30000385 is 58300003.

It can be written as a sum of positive squares in 4 ways, for example, as 9678321 + 20322064 = 3111^2 + 4508^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30000385 - 25 = 30000353 is a prime.

30000385 is a modest number, since divided by 385 gives 30 as remainder.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56340 + ... + 56869.

It is an arithmetic number, because the mean of its divisors is an integer number (4585005).

Almost surely, 230000385 is an apocalyptic number.

It is an amenable number.

30000385 is a deficient number, since it is larger than the sum of its proper divisors (6679655).

30000385 is a wasteful number, since it uses less digits than its factorization.

30000385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113267.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 30000385 is about 5477.2607204697. The cubic root of 30000385 is about 310.7245797947.

Adding to 30000385 its reverse (58300003), we get a palindrome (88300388).

The spelling of 30000385 in words is "thirty million, three hundred eighty-five", and thus it is an aban number.

Divisors: 1 5 53 265 113209 566045 6000077 30000385