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230030442 = 2344013541
BaseRepresentation
bin11011011010111…
…11110001101010
3121000211202110000
431231133301222
5432341433232
634454203430
75462140455
oct1555376152
9530752400
10230030442
11108934304
1265053576
13388700b5
142279c49c
15152dc27c
hexdb5fc6a

230030442 has 40 divisors (see below), whose sum is σ = 516869892. Its totient is φ = 76464000.

The previous prime is 230030393. The next prime is 230030483. The reversal of 230030442 is 244030032.

It can be written as a sum of positive squares in 2 ways, for example, as 209699361 + 20331081 = 14481^2 + 4509^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 63192 + ... + 66732.

Almost surely, 2230030442 is an apocalyptic number.

230030442 is an abundant number, since it is smaller than the sum of its proper divisors (286839450).

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

230030442 is a wasteful number, since it uses less digits than its factorization.

230030442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956 (or 3947 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 18.

The square root of 230030442 is about 15166.7544979142. The cubic root of 230030442 is about 612.7195976161.

Adding to 230030442 its reverse (244030032), we get a palindrome (474060474).

The spelling of 230030442 in words is "two hundred thirty million, thirty thousand, four hundred forty-two".

Divisors: 1 2 3 6 9 18 27 54 81 162 401 802 1203 2406 3541 3609 7082 7218 10623 10827 21246 21654 31869 32481 63738 64962 95607 191214 286821 573642 1419941 2839882 4259823 8519646 12779469 25558938 38338407 76676814 115015221 230030442