43130040 has 32 divisors (see below), whose sum is σ = 129390480. Its totient is φ = 11501312.

The previous prime is 43130027. The next prime is 43130041. The reversal of 43130040 is 4003134.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43130041) 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 7 ways as a sum of consecutive naturals, for example, 179589 + ... + 179828.

Almost surely, 2^43130040 is an apocalyptic number.

43130040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43130040 is an abundant number, since it is smaller than the sum of its proper divisors (86260440).

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

43130040 is a wasteful number, since it uses less digits than its factorization.

43130040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359431 (or 359427 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 43130040 is about 6567.3464961124. The cubic root of 43130040 is about 350.6926148751.

Adding to 43130040 its reverse (4003134), we get a palindrome (47133174).

The spelling of 43130040 in words is "forty-three million, one hundred thirty thousand, forty".