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15380938 = 247163627
BaseRepresentation
bin111010101011…
…000111001010
31001221102200101
4322223013022
512414142223
61305400014
7244510246
oct72530712
931842611
1015380938
118755a21
12519900a
133256b61
142085426
15153c4ad
hexeab1ca

15380938 has 8 divisors (see below), whose sum is σ = 23562432. Its totient is φ = 7526796.

The previous prime is 15380927. The next prime is 15380941. The reversal of 15380938 is 83908351.

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

It is a junction number, because it is equal to n+sod(n) for n = 15380897 and 15380906.

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 3 ways as a sum of consecutive naturals, for example, 81720 + ... + 81907.

It is an arithmetic number, because the mean of its divisors is an integer number (2945304).

Almost surely, 215380938 is an apocalyptic number.

15380938 is a deficient number, since it is larger than the sum of its proper divisors (8181494).

15380938 is a wasteful number, since it uses less digits than its factorization.

15380938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163676.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 15380938 is about 3921.8538983496. The cubic root of 15380938 is about 248.6914992519.

The spelling of 15380938 in words is "fifteen million, three hundred eighty thousand, nine hundred thirty-eight".

Divisors: 1 2 47 94 163627 327254 7690469 15380938