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12870860 = 2251574099
BaseRepresentation
bin110001000110…
…010011001100
3220012220111112
4301012103030
511243331420
61135511152
7214254242
oct61062314
926186445
1012870860
1172a1082
1243884b8
1328884c2
1419d0792
1511e38c5
hexc464cc

12870860 has 24 divisors (see below), whose sum is σ = 27207600. Its totient is φ = 5114304.

The previous prime is 12870841. The next prime is 12870863. The reversal of 12870860 is 6807821.

It is not an unprimeable number, because it can be changed into a prime (12870863) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091 + ... + 5189.

It is an arithmetic number, because the mean of its divisors is an integer number (1133650).

Almost surely, 212870860 is an apocalyptic number.

12870860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12870860 is an abundant number, since it is smaller than the sum of its proper divisors (14336740).

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

12870860 is a wasteful number, since it uses less digits than its factorization.

12870860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4265 (or 4263 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 12870860 is about 3587.5980822829. The cubic root of 12870860 is about 234.3522830723.

The spelling of 12870860 in words is "twelve million, eight hundred seventy thousand, eight hundred sixty".

Divisors: 1 2 4 5 10 20 157 314 628 785 1570 3140 4099 8198 16396 20495 40990 81980 643543 1287086 2574172 3217715 6435430 12870860