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30386247 = 370114449
BaseRepresentation
bin111001111101…
…0100001000111
32010011210002120
41303322201013
530234324442
63003141023
7516164433
oct163724107
963153076
1030386247
1116174701
12a214773
1363aba38
14406d9c3
152a034ec
hex1cfa847

30386247 has 8 divisors (see below), whose sum is σ = 40575600. Its totient is φ = 20227200.

The previous prime is 30386233. The next prime is 30386269. The reversal of 30386247 is 74268303.

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

It is not a de Polignac number, because 30386247 - 212 = 30382151 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30386047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5122 + ... + 9327.

It is an arithmetic number, because the mean of its divisors is an integer number (5071950).

Almost surely, 230386247 is an apocalyptic number.

30386247 is a deficient number, since it is larger than the sum of its proper divisors (10189353).

30386247 is a wasteful number, since it uses less digits than its factorization.

30386247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15153.

The product of its (nonzero) digits is 24192, while the sum is 33.

The square root of 30386247 is about 5512.3721753887. The cubic root of 30386247 is about 312.0510785045.

The spelling of 30386247 in words is "thirty million, three hundred eighty-six thousand, two hundred forty-seven".

Divisors: 1 3 701 2103 14449 43347 10128749 30386247