14399640 has 128 divisors (see below), whose sum is σ = 48960000. Its totient is φ = 3763584.

The previous prime is 14399621. The next prime is 14399653. The reversal of 14399640 is 4699341.

14399640 is a `hidden beast` number, since 1 + 4 + 3 + 9 + 9 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 14399595 and 14399604.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 72261 + ... + 72459.

It is an arithmetic number, because the mean of its divisors is an integer number (382500).

Almost surely, 2^14399640 is an apocalyptic number.

14399640 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 14399640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24480000).

14399640 is an abundant number, since it is smaller than the sum of its proper divisors (34560360).

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

14399640 is a wasteful number, since it uses less digits than its factorization.

14399640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 276 counting only the distinct ones).

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

The square root of 14399640 is about 3794.6857577407. The cubic root of 14399640 is about 243.2860524054.

The spelling of 14399640 in words is "fourteen million, three hundred ninety-nine thousand, six hundred forty".