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18195968 = 2975077
BaseRepresentation
bin100010101101…
…0011000000000
31021020110011202
41011122120000
514124232333
61450000332
7310443320
oct105323000
937213152
1018195968
11a2a899a
1261160a8
133a0125b
1425b9280
1518e65e8
hex115a600

18195968 has 40 divisors (see below), whose sum is σ = 41558352. Its totient is φ = 7796736.

The previous prime is 18195937. The next prime is 18196019. The reversal of 18195968 is 86959181.

It is a congruent number.

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, 1046 + ... + 6122.

Almost surely, 218195968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18195968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20779176).

18195968 is an abundant number, since it is smaller than the sum of its proper divisors (23362384).

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

18195968 is an frugal number, since it uses more digits than its factorization.

18195968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5102 (or 5086 counting only the distinct ones).

The product of its digits is 155520, while the sum is 47.

The square root of 18195968 is about 4265.6732176762. The cubic root of 18195968 is about 263.0217854122.

The spelling of 18195968 in words is "eighteen million, one hundred ninety-five thousand, nine hundred sixty-eight".

Divisors: 1 2 4 7 8 14 16 28 32 56 64 112 128 224 256 448 512 896 1792 3584 5077 10154 20308 35539 40616 71078 81232 142156 162464 284312 324928 568624 649856 1137248 1299712 2274496 2599424 4548992 9097984 18195968