12884540 has 12 divisors (see below), whose sum is σ = 27057576. Its totient is φ = 5153808.

The previous prime is 12884507. The next prime is 12884549. The reversal of 12884540 is 4548821.

It is a happy number.

It is a super-2 number, since 2×12884540² = 332022742023200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12884497 and 12884506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12884549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322094 + ... + 322133.

It is an arithmetic number, because the mean of its divisors is an integer number (2254798).

Almost surely, 2^12884540 is an apocalyptic number.

12884540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12884540 is an abundant number, since it is smaller than the sum of its proper divisors (14173036).

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

12884540 is a wasteful number, since it uses less digits than its factorization.

12884540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644236 (or 644234 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 12884540 is about 3589.5041440288. The cubic root of 12884540 is about 234.4352820347.

The spelling of 12884540 in words is "twelve million, eight hundred eighty-four thousand, five hundred forty".