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42538138 = 231686099
BaseRepresentation
bin1010001001000…
…1010010011010
32222001011100121
42202101102122
541342210023
64115423454
71024365616
oct242212232
988034317
1042538138
1122014595
12122b4b8a
138a74bc6
145914346
153b03d5d
hex289149a

42538138 has 8 divisors (see below), whose sum is σ = 65865600. Its totient is φ = 20582940.

The previous prime is 42538127. The next prime is 42538151. The reversal of 42538138 is 83183524.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342988 + ... + 343111.

It is an arithmetic number, because the mean of its divisors is an integer number (8233200).

Almost surely, 242538138 is an apocalyptic number.

42538138 is a deficient number, since it is larger than the sum of its proper divisors (23327462).

42538138 is a wasteful number, since it uses less digits than its factorization.

42538138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686132.

The product of its digits is 23040, while the sum is 34.

The square root of 42538138 is about 6522.1268003620. The cubic root of 42538138 is about 349.0809575655.

The spelling of 42538138 in words is "forty-two million, five hundred thirty-eight thousand, one hundred thirty-eight".

Divisors: 1 2 31 62 686099 1372198 21269069 42538138