43487840 has 48 divisors (see below), whose sum is σ = 112084560. Its totient is φ = 15813120.

The previous prime is 43487837. The next prime is 43487869. The reversal of 43487840 is 4878434.

It is a junction number, because it is equal to n+sod(n) for n = 43487794 and 43487803.

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 7 ways as a sum of consecutive naturals, for example, 10595 + ... + 14114.

It is an arithmetic number, because the mean of its divisors is an integer number (2335095).

Almost surely, 2^43487840 is an apocalyptic number.

43487840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

43487840 is an abundant number, since it is smaller than the sum of its proper divisors (68596720).

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

43487840 is a wasteful number, since it uses less digits than its factorization.

43487840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24735 (or 24727 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 38.

The square root of 43487840 is about 6594.5310674831. The cubic root of 43487840 is about 351.6597090133.

The spelling of 43487840 in words is "forty-three million, four hundred eighty-seven thousand, eight hundred forty".