14257440 has 72 divisors (see below), whose sum is σ = 48658428. Its totient is φ = 3801600.

The previous prime is 14257423. The next prime is 14257457. The reversal of 14257440 is 4475241.

It is an interprime number because it is at equal distance from previous prime (14257423) and next prime (14257457).

It can be written as a sum of positive squares in 2 ways, for example, as 13571856 + 685584 = 3684^2 + 828^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3511 + ... + 6390.

Almost surely, 2^14257440 is an apocalyptic number.

14257440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14257440 is an abundant number, since it is smaller than the sum of its proper divisors (34400988).

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

14257440 is a wasteful number, since it uses less digits than its factorization.

14257440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9922 (or 9911 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 14257440 is about 3775.9025411152. The cubic root of 14257440 is about 242.4825650837.

The spelling of 14257440 in words is "fourteen million, two hundred fifty-seven thousand, four hundred forty".