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12815190 = 2325142391
BaseRepresentation
bin110000111000…
…101101010110
3220010002010200
4300320231112
511240041230
61134401330
7213633033
oct60705526
926102120
1012815190
117263273
124360246
13286906b
1419b838a
1511d2160
hexc38b56

12815190 has 24 divisors (see below), whose sum is σ = 33319728. Its totient is φ = 3417360.

The previous prime is 12815171. The next prime is 12815191. The reversal of 12815190 is 9151821.

12815190 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×128151902 = 328458189472200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12815191) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71106 + ... + 71285.

It is an arithmetic number, because the mean of its divisors is an integer number (1388322).

Almost surely, 212815190 is an apocalyptic number.

12815190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12815190 is an abundant number, since it is smaller than the sum of its proper divisors (20504538).

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

12815190 is a wasteful number, since it uses less digits than its factorization.

12815190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142404 (or 142401 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 12815190 is about 3579.8310015977. The cubic root of 12815190 is about 234.0139154556.

The spelling of 12815190 in words is "twelve million, eight hundred fifteen thousand, one hundred ninety".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 90 142391 284782 427173 711955 854346 1281519 1423910 2135865 2563038 4271730 6407595 12815190