14213640 has 64 divisors (see below), whose sum is σ = 48735360. Its totient is φ = 3248640.

The previous prime is 14213627. The next prime is 14213657. The reversal of 14213640 is 4631241.

It is a Harshad number since it is a multiple of its sum of digits (21).

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, 7621 + ... + 9300.

It is an arithmetic number, because the mean of its divisors is an integer number (761490).

Almost surely, 2^14213640 is an apocalyptic number.

14213640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14213640 is an abundant number, since it is smaller than the sum of its proper divisors (34521720).

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

14213640 is a wasteful number, since it uses less digits than its factorization.

14213640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16942 (or 16938 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 14213640 is about 3770.0981419586. The cubic root of 14213640 is about 242.2340017402.

Adding to 14213640 its reverse (4631241), we get a palindrome (18844881).

The spelling of 14213640 in words is "fourteen million, two hundred thirteen thousand, six hundred forty".