12538280 has 32 divisors (see below), whose sum is σ = 28326240. Its totient is φ = 4994880.

The previous prime is 12538277. The next prime is 12538283. The reversal of 12538280 is 8283521.

It is an interprime number because it is at equal distance from previous prime (12538277) and next prime (12538283).

It is not an unprimeable number, because it can be changed into a prime (12538283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12767 + ... + 13713.

It is an arithmetic number, because the mean of its divisors is an integer number (885195).

Almost surely, 2^12538280 is an apocalyptic number.

12538280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12538280 is an abundant number, since it is smaller than the sum of its proper divisors (15787960).

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

12538280 is a wasteful number, since it uses less digits than its factorization.

12538280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1289 (or 1285 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 12538280 is about 3540.9433771242. The cubic root of 12538280 is about 232.3161069510.

The spelling of 12538280 in words is "twelve million, five hundred thirty-eight thousand, two hundred eighty".