12208890 has 64 divisors (see below), whose sum is σ = 31912704. Its totient is φ = 2976768.

The previous prime is 12208877. The next prime is 12208909. The reversal of 12208890 is 9880221.

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

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, 18547 + ... + 19193.

It is an arithmetic number, because the mean of its divisors is an integer number (498636).

Almost surely, 2^12208890 is an apocalyptic number.

12208890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12208890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15956352).

12208890 is an abundant number, since it is smaller than the sum of its proper divisors (19703814).

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

12208890 is a wasteful number, since it uses less digits than its factorization.

12208890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 711.

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

The square root of 12208890 is about 3494.1222073648. The cubic root of 12208890 is about 230.2636548022.

The spelling of 12208890 in words is "twelve million, two hundred eight thousand, eight hundred ninety".