14642440 has 64 divisors (see below), whose sum is σ = 35555760. Its totient is φ = 5406720.

The previous prime is 14642429. The next prime is 14642449. The reversal of 14642440 is 4424641.

14642440 = 981² + 982² + ... + 995².

It can be written as a sum of positive squares in 8 ways, for example, as 3526884 + 11115556 = 1878^2 + 3334^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14642449) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 41304 + ... + 41656.

Almost surely, 2^14642440 is an apocalyptic number.

14642440 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 14642440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17777880).

14642440 is an abundant number, since it is smaller than the sum of its proper divisors (20913320).

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

14642440 is a wasteful number, since it uses less digits than its factorization.

14642440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 14642440 is about 3826.5441327652. The cubic root of 14642440 is about 244.6458300637.

The spelling of 14642440 in words is "fourteen million, six hundred forty-two thousand, four hundred forty".