43540920 has 48 divisors (see below), whose sum is σ = 141509160. Its totient is φ = 11610816.

The previous prime is 43540883. The next prime is 43540969. The reversal of 43540920 is 2904534.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 60114 + ... + 60833.

Almost surely, 2^43540920 is an apocalyptic number.

43540920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43540920 is an abundant number, since it is smaller than the sum of its proper divisors (97968240).

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

43540920 is a wasteful number, since it uses less digits than its factorization.

43540920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120964 (or 120957 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 43540920 is about 6598.5543871366. The cubic root of 43540920 is about 351.8027260657.

The spelling of 43540920 in words is "forty-three million, five hundred forty thousand, nine hundred twenty".