40543812 has 36 divisors (see below), whose sum is σ = 102735360. Its totient is φ = 13481712.

The previous prime is 40543801. The next prime is 40543843. The reversal of 40543812 is 21834504.

40543812 is a `hidden beast` number, since 40 + 543 + 81 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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, 16989 + ... + 19227.

It is an arithmetic number, because the mean of its divisors is an integer number (2853760).

Almost surely, 2^40543812 is an apocalyptic number.

It is an amenable number.

40543812 is an abundant number, since it is smaller than the sum of its proper divisors (62191548).

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

40543812 is a wasteful number, since it uses less digits than its factorization.

40543812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2752 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 40543812 is about 6367.4022960702. The cubic root of 40543812 is about 343.5380607826.

It can be divided in two parts, 405438 and 12, that added together give a triangular number (405450 = T₉₀₀).

The spelling of 40543812 in words is "forty million, five hundred forty-three thousand, eight hundred twelve".