14139840 has 224 divisors, whose sum is σ = 53254656. Its totient is φ = 3133440.

The previous prime is 14139823. The next prime is 14139841. The reversal of 14139840 is 4893141.

It is a happy number.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 14139798 and 14139807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (14139841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137229 + ... + 137331.

It is an arithmetic number, because the mean of its divisors is an integer number (237744).

Almost surely, 2^14139840 is an apocalyptic number.

14139840 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 14139840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26627328).

14139840 is an abundant number, since it is smaller than the sum of its proper divisors (39114816).

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

14139840 is a wasteful number, since it uses less digits than its factorization.

14139840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 137 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 14139840 is about 3760.2978605424. The cubic root of 14139840 is about 241.8140319329.

The spelling of 14139840 in words is "fourteen million, one hundred thirty-nine thousand, eight hundred forty".