43630040 has 32 divisors (see below), whose sum is σ = 98372880. Its totient is φ = 17415552.

The previous prime is 43630033. The next prime is 43630049. The reversal of 43630040 is 4003634.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 43629994 and 43630021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43630049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26522 + ... + 28118.

Almost surely, 2^43630040 is an apocalyptic number.

43630040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43630040 is an abundant number, since it is smaller than the sum of its proper divisors (54742840).

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

43630040 is a wasteful number, since it uses less digits than its factorization.

43630040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291 (or 2287 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 43630040 is about 6605.3039294191. The cubic root of 43630040 is about 352.0425869617.

Adding to 43630040 its reverse (4003634), we get a palindrome (47633674).

The spelling of 43630040 in words is "forty-three million, six hundred thirty thousand, forty".