14263440 has 80 divisors (see below), whose sum is σ = 44723328. Its totient is φ = 3760128.

The previous prime is 14263409. The next prime is 14263451. The reversal of 14263440 is 4436241.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 8.

It is a self number, because there is not a number n which added to its sum of digits gives 14263440.

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, 24432 + ... + 25008.

Almost surely, 2^14263440 is an apocalyptic number.

14263440 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 14263440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22361664).

14263440 is an abundant number, since it is smaller than the sum of its proper divisors (30459888).

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

14263440 is a wasteful number, since it uses less digits than its factorization.

14263440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 696 (or 690 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 14263440 is about 3776.6969695754. The cubic root of 14263440 is about 242.5165751947.

Adding to 14263440 its reverse (4436241), we get a palindrome (18699681).

The spelling of 14263440 in words is "fourteen million, two hundred sixty-three thousand, four hundred forty".