43041780 has 90 divisors (see below), whose sum is σ = 135857106. Its totient is φ = 11407392.

The previous prime is 43041751. The next prime is 43041781. The reversal of 43041780 is 8714034.

It can be written as a sum of positive squares in only one way, i.e., 34433424 + 8608356 = 5868^2 + 2934^2 .

It is a tau number, because it is divible by the number of its divisors (90).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 9.

It is a zygodrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43041781) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 263979 + ... + 264141.

Almost surely, 2^43041780 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 43041780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67928553).

43041780 is an abundant number, since it is smaller than the sum of its proper divisors (92815326).

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

43041780 is a wasteful number, since it uses less digits than its factorization.

43041780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347 (or 173 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 43041780 is about 6560.6234459844. The cubic root of 43041780 is about 350.4532359535.

It can be divided in two parts, 4304 and 1780, that added together give a square (6084 = 78²).

The spelling of 43041780 in words is "forty-three million, forty-one thousand, seven hundred eighty".