12890220 has 96 divisors (see below), whose sum is σ = 42190848. Its totient is φ = 2879232.

The previous prime is 12890219. The next prime is 12890243. The reversal of 12890220 is 2209821.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19414 + ... + 20066.

It is an arithmetic number, because the mean of its divisors is an integer number (439488).

Almost surely, 2^12890220 is an apocalyptic number.

12890220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12890220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21095424).

12890220 is an abundant number, since it is smaller than the sum of its proper divisors (29300628).

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

12890220 is a wasteful number, since it uses less digits than its factorization.

12890220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 717 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 12890220 is about 3590.2952524827. The cubic root of 12890220 is about 234.4697263319.

The spelling of 12890220 in words is "twelve million, eight hundred ninety thousand, two hundred twenty".