14231640 has 64 divisors (see below), whose sum is σ = 42962400. Its totient is φ = 3771392.

The previous prime is 14231629. The next prime is 14231653. The reversal of 14231640 is 4613241.

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, 27706 + ... + 28214.

Almost surely, 2^14231640 is an apocalyptic number.

14231640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 14231640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21481200).

14231640 is an abundant number, since it is smaller than the sum of its proper divisors (28730760).

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

14231640 is a wasteful number, since it uses less digits than its factorization.

14231640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 752 counting only the distinct ones).

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

The square root of 14231640 is about 3772.4845924139. The cubic root of 14231640 is about 242.3362127795.

Adding to 14231640 its reverse (4613241), we get a palindrome (18844881).

The spelling of 14231640 in words is "fourteen million, two hundred thirty-one thousand, six hundred forty".