40445530 has 8 divisors (see below), whose sum is σ = 72801972. Its totient is φ = 16178208.

The previous prime is 40445527. The next prime is 40445539. The reversal of 40445530 is 3554404.

It can be written as a sum of positive squares in 2 ways, for example, as 40436881 + 8649 = 6359^2 + 93^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 40445495 and 40445504.

It is not an unprimeable number, because it can be changed into a prime (40445539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2022267 + ... + 2022286.

Almost surely, 2^40445530 is an apocalyptic number.

40445530 is a deficient number, since it is larger than the sum of its proper divisors (32356442).

40445530 is a wasteful number, since it uses less digits than its factorization.

40445530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4044560.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 40445530 is about 6359.6800233974. The cubic root of 40445530 is about 343.2602466940.

Adding to 40445530 its reverse (3554404), we get a palindrome (43999934).

The spelling of 40445530 in words is "forty million, four hundred forty-five thousand, five hundred thirty".