43640142 has 64 divisors (see below), whose sum is σ = 108186624. Its totient is φ = 11427840.

The previous prime is 43640089. The next prime is 43640183. The reversal of 43640142 is 24104634.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140167 + ... + 140477.

It is an arithmetic number, because the mean of its divisors is an integer number (1690416).

Almost surely, 2^43640142 is an apocalyptic number.

43640142 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 43640142, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54093312).

43640142 is an abundant number, since it is smaller than the sum of its proper divisors (64546482).

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

43640142 is a wasteful number, since it uses less digits than its factorization.

43640142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 43640142 is about 6606.0685736677. The cubic root of 43640142 is about 352.0697552443.

Adding to 43640142 its reverse (24104634), we get a palindrome (67744776).

The spelling of 43640142 in words is "forty-three million, six hundred forty thousand, one hundred forty-two".