12890280 has 64 divisors (see below), whose sum is σ = 41650560. Its totient is φ = 3172608.

The previous prime is 12890243. The next prime is 12890287. The reversal of 12890280 is 8209821.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (12890287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2572 + ... + 5691.

It is an arithmetic number, because the mean of its divisors is an integer number (650790).

Almost surely, 2^12890280 is an apocalyptic number.

12890280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12890280 is an abundant number, since it is smaller than the sum of its proper divisors (28760280).

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

12890280 is a wasteful number, since it uses less digits than its factorization.

12890280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8290 (or 8286 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 30.

The square root of 12890280 is about 3590.3036083318. The cubic root of 12890280 is about 234.4700901261.

The spelling of 12890280 in words is "twelve million, eight hundred ninety thousand, two hundred eighty".