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BaseRepresentation
bin11111001000101001111000
3120100200001001
4133020221320
54042140122
6450534344
7126242443
oct37105170
916320031
108161912
114675190
1228973b4
1318ca045
14112665a
15ab3527
hex7c8a78

8161912 has 32 divisors (see below), whose sum is σ = 16841520. Its totient is φ = 3677440.

The previous prime is 8161903. The next prime is 8161913. The reversal of 8161912 is 2191618.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8161913) by changing a digit.

It is a Kaprekar number, because its square (66616807495744) can be partitioned into two parts whose sum is 8161912.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11718 + ... + 12394.

Almost surely, 28161912 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 8161912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8420760).

8161912 is an abundant number, since it is smaller than the sum of its proper divisors (8679608).

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

8161912 is a wasteful number, since it uses less digits than its factorization.

8161912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 831 (or 827 counting only the distinct ones).

The product of its digits is 864, while the sum is 28.

The square root of 8161912 is about 2856.9060187553. The cubic root of 8161912 is about 201.3402650519.

The spelling of 8161912 in words is "eight million, one hundred sixty-one thousand, nine hundred twelve".