43940544400 has 135 divisors (see below), whose sum is σ = 108346908081. Its totient is φ = 17125115520.

The previous prime is 43940544379. The next prime is 43940544421. The reversal of 43940544400 is 444504934.

The square root of 43940544400 is 209620.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (43940544379) and next prime (43940544421).

It can be written as a sum of positive squares in only one way, i.e., 15818595984 + 28121948416 = 125772^2 + 167696^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43940544400.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 197042689 + ... + 197042911.

Almost surely, 2^43940544400 is an apocalyptic number.

43940544400 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

43940544400 is the 209620-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43940544400

43940544400 is an abundant number, since it is smaller than the sum of its proper divisors (64406363681).

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

43940544400 is an equidigital number, since it uses as much as digits as its factorization.

43940544400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 558 (or 277 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 37.

The spelling of 43940544400 in words is "forty-three billion, nine hundred forty million, five hundred forty-four thousand, four hundred".