14266640 has 20 divisors (see below), whose sum is σ = 33170124. Its totient is φ = 5706624.

The previous prime is 14266639. The next prime is 14266649. The reversal of 14266640 is 4666241.

It can be written as a sum of positive squares in 2 ways, for example, as 4804864 + 9461776 = 2192^2 + 3076^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (14266649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89087 + ... + 89246.

Almost surely, 2^14266640 is an apocalyptic number.

14266640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

14266640 is an abundant number, since it is smaller than the sum of its proper divisors (18903484).

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

14266640 is a wasteful number, since it uses less digits than its factorization.

14266640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178346 (or 178340 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 14266640 is about 3777.1205964332. The cubic root of 14266640 is about 242.5347100208.

The spelling of 14266640 in words is "fourteen million, two hundred sixty-six thousand, six hundred forty".