40442404 has 12 divisors (see below), whose sum is σ = 71504524. Its totient is φ = 20012544.

The previous prime is 40442377. The next prime is 40442407. The reversal of 40442404 is 40424404.

It can be written as a sum of positive squares in 2 ways, for example, as 24522304 + 15920100 = 4952^2 + 3990^2 .

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (40442407) 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, 51729 + ... + 52504.

Almost surely, 2^40442404 is an apocalyptic number.

It is an amenable number.

40442404 is a deficient number, since it is larger than the sum of its proper divisors (31062120).

40442404 is a wasteful number, since it uses less digits than its factorization.

40442404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104334 (or 104332 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 40442404 is about 6359.4342515667. The cubic root of 40442404 is about 343.2514030371.

Adding to 40442404 its reverse (40424404), we get a palindrome (80866808).

The spelling of 40442404 in words is "forty million, four hundred forty-two thousand, four hundred four".