40043000 has 64 divisors (see below), whose sum is σ = 97830720. Its totient is φ = 15312000.

The previous prime is 40042993. The next prime is 40043063. The reversal of 40043000 is 34004.

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 15 ways as a sum of consecutive naturals, for example, 22130 + ... + 23870.

It is an arithmetic number, because the mean of its divisors is an integer number (1528605).

Almost surely, 2^40043000 is an apocalyptic number.

40043000 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40043000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48915360).

40043000 is an abundant number, since it is smaller than the sum of its proper divisors (57787720).

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

40043000 is a wasteful number, since it uses less digits than its factorization.

40043000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1785 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 11.

The square root of 40043000 is about 6327.9538557104. The cubic root of 40043000 is about 342.1176937246.

Adding to 40043000 its reverse (34004), we get a palindrome (40077004).

The spelling of 40043000 in words is "forty million, forty-three thousand".