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16004399 = 59271261
BaseRepresentation
bin111101000011…
…010100101111
31010010002220112
4331003110233
513044120044
61331010235
7253015025
oct75032457
933102815
1016004399
119041384
12543997b
133414878
1421a8715
15161209e
hexf4352f

16004399 has 4 divisors (see below), whose sum is σ = 16275720. Its totient is φ = 15733080.

The previous prime is 16004383. The next prime is 16004411. The reversal of 16004399 is 99340061.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99340061 = 175843533.

It is a cyclic number.

It is not a de Polignac number, because 16004399 - 24 = 16004383 is a prime.

It is a super-2 number, since 2×160043992 = 512281574702402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16004369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135572 + ... + 135689.

It is an arithmetic number, because the mean of its divisors is an integer number (4068930).

Almost surely, 216004399 is an apocalyptic number.

16004399 is a deficient number, since it is larger than the sum of its proper divisors (271321).

16004399 is an equidigital number, since it uses as much as digits as its factorization.

16004399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271320.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16004399 is about 4000.5498372099. The cubic root of 16004399 is about 252.0073011658.

The spelling of 16004399 in words is "sixteen million, four thousand, three hundred ninety-nine".

Divisors: 1 59 271261 16004399