6432140 has 72 divisors (see below), whose sum is σ = 16048368. Its totient is φ = 2146560.

The previous prime is 6432131. The next prime is 6432149. The reversal of 6432140 is 412346.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6432131) and next prime (6432149).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (6432149) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37094 + ... + 37266.

It is an arithmetic number, because the mean of its divisors is an integer number (222894).

Almost surely, 2^6432140 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6432140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8024184).

6432140 is an abundant number, since it is smaller than the sum of its proper divisors (9616228).

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

6432140 is a wasteful number, since it uses less digits than its factorization.

6432140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 6432140 is about 2536.1663983264. The cubic root of 6432140 is about 185.9738275888.

Adding to 6432140 its reverse (412346), we get a palindrome (6844486).

The spelling of 6432140 in words is "six million, four hundred thirty-two thousand, one hundred forty".