14215440 has 80 divisors (see below), whose sum is σ = 44836416. Its totient is φ = 3724800.

The previous prime is 14215387. The next prime is 14215459. The reversal of 14215440 is 4451241.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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, 14155 + ... + 15125.

Almost surely, 2^14215440 is an apocalyptic number.

14215440 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 14215440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22418208).

14215440 is an abundant number, since it is smaller than the sum of its proper divisors (30620976).

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

14215440 is a wasteful number, since it uses less digits than its factorization.

14215440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 14215440 is about 3770.3368549773. The cubic root of 14215440 is about 242.2442267259.

Adding to 14215440 its reverse (4451241), we get a palindrome (18666681).

The spelling of 14215440 in words is "fourteen million, two hundred fifteen thousand, four hundred forty".