43400140 has 48 divisors (see below), whose sum is σ = 106714944. Its totient is φ = 14515200.

The previous prime is 43400131. The next prime is 43400141. The reversal of 43400140 is 4100434.

It is not an unprimeable number, because it can be changed into a prime (43400141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1960 + ... + 9520.

It is an arithmetic number, because the mean of its divisors is an integer number (2223228).

Almost surely, 2^43400140 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 43400140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53357472).

43400140 is an abundant number, since it is smaller than the sum of its proper divisors (63314804).

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

43400140 is a wasteful number, since it uses less digits than its factorization.

43400140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7618 (or 7616 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 43400140 is about 6587.8782623846. The cubic root of 43400140 is about 351.4231577434.

Adding to 43400140 its reverse (4100434), we get a palindrome (47500574).

The spelling of 43400140 in words is "forty-three million, four hundred thousand, one hundred forty".