40020404 has 12 divisors (see below), whose sum is σ = 70192164. Its totient is φ = 19965504.

The previous prime is 40020389. The next prime is 40020433. The reversal of 40020404 is 40402004.

It can be written as a sum of positive squares in 2 ways, for example, as 32512804 + 7507600 = 5702^2 + 2740^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9119 + ... + 12774.

It is an arithmetic number, because the mean of its divisors is an integer number (5849347).

Almost surely, 2^40020404 is an apocalyptic number.

It is an amenable number.

40020404 is a deficient number, since it is larger than the sum of its proper divisors (30171760).

40020404 is a wasteful number, since it uses less digits than its factorization.

40020404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22354 (or 22352 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 14.

The square root of 40020404 is about 6326.1681925159. The cubic root of 40020404 is about 342.0533300326.

Adding to 40020404 its reverse (40402004), we get a palindrome (80422408).

The spelling of 40020404 in words is "forty million, twenty thousand, four hundred four".