14640399 has 8 divisors (see below), whose sum is σ = 21689520. Its totient is φ = 9760248.

The previous prime is 14640377. The next prime is 14640491. The reversal of 14640399 is 99304641.

14640399 is a `hidden beast` number, since 1 + 4 + 640 + 3 + 9 + 9 = 666.

It is not a de Polignac number, because 14640399 - 2¹³ = 14632207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14640499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 271092 + ... + 271145.

It is an arithmetic number, because the mean of its divisors is an integer number (2711190).

Almost surely, 2^14640399 is an apocalyptic number.

14640399 is a deficient number, since it is larger than the sum of its proper divisors (7049121).

14640399 is an equidigital number, since it uses as much as digits as its factorization.

14640399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 542246 (or 542240 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 14640399 is about 3826.2774337468. The cubic root of 14640399 is about 244.6344625288.

The spelling of 14640399 in words is "fourteen million, six hundred forty thousand, three hundred ninety-nine".