40443394 has 4 divisors (see below), whose sum is σ = 60665094. Its totient is φ = 20221696.

The previous prime is 40443383. The next prime is 40443401. The reversal of 40443394 is 49334404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30107169 + 10336225 = 5487^2 + 3215^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110847 + ... + 10110850.

Almost surely, 2^40443394 is an apocalyptic number.

40443394 is a deficient number, since it is larger than the sum of its proper divisors (20221700).

40443394 is a wasteful number, since it uses less digits than its factorization.

40443394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20221699.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 40443394 is about 6359.5120882030. The cubic root of 40443394 is about 343.2542038606.

Adding to 40443394 its reverse (49334404), we get a palindrome (89777798).

The spelling of 40443394 in words is "forty million, four hundred forty-three thousand, three hundred ninety-four".