14215640 has 32 divisors (see below), whose sum is σ = 32125680. Its totient is φ = 5661312.

The previous prime is 14215631. The next prime is 14215651. The reversal of 14215640 is 4651241.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10439 + ... + 11721.

Almost surely, 2^14215640 is an apocalyptic number.

14215640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14215640 is an abundant number, since it is smaller than the sum of its proper divisors (17910040).

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

14215640 is a wasteful number, since it uses less digits than its factorization.

14215640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1571 (or 1567 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 14215640 is about 3770.3633777131. The cubic root of 14215640 is about 242.2453627822.

Adding to 14215640 its reverse (4651241), we get a palindrome (18866881).

The spelling of 14215640 in words is "fourteen million, two hundred fifteen thousand, six hundred forty".