12229640 has 16 divisors (see below), whose sum is σ = 27516780. Its totient is φ = 4891840.

The previous prime is 12229631. The next prime is 12229667. The reversal of 12229640 is 4692221.

It can be written as a sum of positive squares in 2 ways, for example, as 10252804 + 1976836 = 3202^2 + 1406^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152831 + ... + 152910.

Almost surely, 2^12229640 is an apocalyptic number.

12229640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12229640 is an abundant number, since it is smaller than the sum of its proper divisors (15287140).

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

12229640 is a wasteful number, since it uses less digits than its factorization.

12229640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305752 (or 305748 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 12229640 is about 3497.0902190250. The cubic root of 12229640 is about 230.3940315616.

The spelling of 12229640 in words is "twelve million, two hundred twenty-nine thousand, six hundred forty".