Search a number
-
+
238103145 = 345783987
BaseRepresentation
bin11100011000100…
…10101001101001
3121121000220010000
432030102221221
5441423300040
635343213213
75620562160
oct1614225151
9547026100
10238103145
11112448465
12678a7209
133a438647
14238a03d7
1515d84130
hexe312a69

238103145 has 40 divisors (see below), whose sum is σ = 487802304. Its totient is φ = 108845856.

The previous prime is 238103053. The next prime is 238103167. The reversal of 238103145 is 541301832.

It is a happy number.

It is not a de Polignac number, because 238103145 - 27 = 238103017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 39 ways as a sum of consecutive naturals, for example, 39159 + ... + 44828.

Almost surely, 2238103145 is an apocalyptic number.

It is an amenable number.

238103145 is an abundant number, since it is smaller than the sum of its proper divisors (249699159).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

238103145 is an equidigital number, since it uses as much as digits as its factorization.

238103145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84011 (or 84002 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 238103145 is about 15430.5912070795. The cubic root of 238103145 is about 619.8049551235.

Adding to 238103145 its reverse (541301832), we get a palindrome (779404977).

The spelling of 238103145 in words is "two hundred thirty-eight million, one hundred three thousand, one hundred forty-five".

Divisors: 1 3 5 7 9 15 21 27 35 45 63 81 105 135 189 315 405 567 945 2835 83987 251961 419935 587909 755883 1259805 1763727 2267649 2939545 3779415 5291181 6802947 8818635 11338245 15873543 26455905 34014735 47620629 79367715 238103145