14257640 has 16 divisors (see below), whose sum is σ = 32079780. Its totient is φ = 5703040.

The previous prime is 14257637. The next prime is 14257651. The reversal of 14257640 is 4675241.

It can be written as a sum of positive squares in 2 ways, for example, as 13293316 + 964324 = 3646^2 + 982^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 178181 + ... + 178260.

Almost surely, 2^14257640 is an apocalyptic number.

14257640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14257640 is an abundant number, since it is smaller than the sum of its proper divisors (17822140).

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

14257640 is a wasteful number, since it uses less digits than its factorization.

14257640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356452 (or 356448 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 14257640 is about 3775.9290247567. The cubic root of 14257640 is about 242.4836989078.

The spelling of 14257640 in words is "fourteen million, two hundred fifty-seven thousand, six hundred forty".