43130640 has 80 divisors (see below), whose sum is σ = 152811648. Its totient is φ = 9858048.

The previous prime is 43130639. The next prime is 43130651. The reversal of 43130640 is 4603134.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11157 + ... + 14516.

Almost surely, 2^43130640 is an apocalyptic number.

43130640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43130640 is an abundant number, since it is smaller than the sum of its proper divisors (109681008).

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

43130640 is a wasteful number, since it uses less digits than its factorization.

43130640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25696 (or 25690 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 43130640 is about 6567.3921765035. The cubic root of 43130640 is about 350.6942410781.

Adding to 43130640 its reverse (4603134), we get a palindrome (47733774).

The spelling of 43130640 in words is "forty-three million, one hundred thirty thousand, six hundred forty".