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30000345 = 3515712739
BaseRepresentation
bin111001001110…
…0010011011001
32002110011201220
41302130103121
530140002340
62551002253
7512666364
oct162342331
962404656
1030000345
1115a30781
12a069389
1362a51ab
143dad0db
152978ed0
hex1c9c4d9

30000345 has 16 divisors (see below), whose sum is σ = 48310080. Its totient is φ = 15897024.

The previous prime is 30000337. The next prime is 30000353. The reversal of 30000345 is 54300003.

It is an interprime number because it is at equal distance from previous prime (30000337) and next prime (30000353).

It is not a de Polignac number, because 30000345 - 23 = 30000337 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4015 + ... + 8724.

It is an arithmetic number, because the mean of its divisors is an integer number (3019380).

Almost surely, 230000345 is an apocalyptic number.

It is an amenable number.

30000345 is a deficient number, since it is larger than the sum of its proper divisors (18309735).

30000345 is a wasteful number, since it uses less digits than its factorization.

30000345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12904.

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 30000345 is about 5477.2570690082. The cubic root of 30000345 is about 310.7244416966.

Adding to 30000345 its reverse (54300003), we get a palindrome (84300348).

The spelling of 30000345 in words is "thirty million, three hundred forty-five", and thus it is an aban number.

Divisors: 1 3 5 15 157 471 785 2355 12739 38217 63695 191085 2000023 6000069 10000115 30000345