12212340 has 48 divisors (see below), whose sum is σ = 39080832. Its totient is φ = 2791296.

The previous prime is 12212327. The next prime is 12212363. The reversal of 12212340 is 4321221.

12212340 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14119 + ... + 14958.

It is an arithmetic number, because the mean of its divisors is an integer number (814184).

Almost surely, 2^12212340 is an apocalyptic number.

12212340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12212340 is an abundant number, since it is smaller than the sum of its proper divisors (26868492).

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

12212340 is a wasteful number, since it uses less digits than its factorization.

12212340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29096 (or 29094 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 12212340 is about 3494.6158587175. The cubic root of 12212340 is about 230.2853421353.

Adding to 12212340 its reverse (4321221), we get a palindrome (16533561).

The spelling of 12212340 in words is "twelve million, two hundred twelve thousand, three hundred forty".