43500040 has 32 divisors (see below), whose sum is σ = 98657280. Its totient is φ = 17260992.

The previous prime is 43500031. The next prime is 43500053. The reversal of 43500040 is 4000534.

It is a junction number, because it is equal to n+sod(n) for n = 43499987 and 43500023.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 799 + ... + 9361.

It is an arithmetic number, because the mean of its divisors is an integer number (3083040).

Almost surely, 2^43500040 is an apocalyptic number.

43500040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43500040 is an abundant number, since it is smaller than the sum of its proper divisors (55157240).

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

43500040 is a wasteful number, since it uses less digits than its factorization.

43500040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8701 (or 8697 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 43500040 is about 6595.4560115279. The cubic root of 43500040 is about 351.6925905983.

Adding to 43500040 its reverse (4000534), we get a palindrome (47500574).

The spelling of 43500040 in words is "forty-three million, five hundred thousand, forty".