12887240 has 32 divisors (see below), whose sum is σ = 29160000. Its totient is φ = 5125824.

The previous prime is 12887239. The next prime is 12887261. The reversal of 12887240 is 4278821.

It is a junction number, because it is equal to n+sod(n) for n = 12887197 and 12887206.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7151 + ... + 8769.

It is an arithmetic number, because the mean of its divisors is an integer number (911250).

Almost surely, 2^12887240 is an apocalyptic number.

12887240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12887240 is an abundant number, since it is smaller than the sum of its proper divisors (16272760).

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

12887240 is a wasteful number, since it uses less digits than its factorization.

12887240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1829 (or 1825 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 12887240 is about 3589.8802208430. The cubic root of 12887240 is about 234.4516564662.

The spelling of 12887240 in words is "twelve million, eight hundred eighty-seven thousand, two hundred forty".