40443380 has 24 divisors (see below), whose sum is σ = 85889160. Its totient is φ = 15994880.

The previous prime is 40443353. The next prime is 40443383. The reversal of 40443380 is 8334404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 425104 + 40018276 = 652^2 + 6326^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40443383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9581 + ... + 13140.

It is an arithmetic number, because the mean of its divisors is an integer number (3578715).

Almost surely, 2^40443380 is an apocalyptic number.

It is an amenable number.

40443380 is an abundant number, since it is smaller than the sum of its proper divisors (45445780).

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

40443380 is a wasteful number, since it uses less digits than its factorization.

40443380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22819 (or 22817 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 40443380 is about 6359.5109874895. The cubic root of 40443380 is about 343.2541642534.

Adding to 40443380 its reverse (8334404), we get a palindrome (48777784).

The spelling of 40443380 in words is "forty million, four hundred forty-three thousand, three hundred eighty".