43781064 has 64 divisors (see below), whose sum is σ = 114912000. Its totient is φ = 13883904.

The previous prime is 43781051. The next prime is 43781081. The reversal of 43781064 is 46018734.

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, 41212 + ... + 42260.

It is an arithmetic number, because the mean of its divisors is an integer number (1795500).

Almost surely, 2^43781064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43781064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57456000).

43781064 is an abundant number, since it is smaller than the sum of its proper divisors (71130936).

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

43781064 is a wasteful number, since it uses less digits than its factorization.

43781064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1138 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 43781064 is about 6616.7260786585. The cubic root of 43781064 is about 352.4483139348.

Adding to 43781064 its reverse (46018734), we get a palindrome (89799798).

Subtracting 43781064 from its reverse (46018734), we obtain a triangular number (2237670 = T₂₁₁₅).

The spelling of 43781064 in words is "forty-three million, seven hundred eighty-one thousand, sixty-four".