40405604 has 6 divisors (see below), whose sum is σ = 70709814. Its totient is φ = 20202800.

The previous prime is 40405601. The next prime is 40405627. The reversal of 40405604 is 40650404.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 38440000 + 1965604 = 6200^2 + 1402^2 .

It is a super-2 number, since 2×40405604² = 3265225669209632, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40405604.

It is not an unprimeable number, because it can be changed into a prime (40405601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5050697 + ... + 5050704.

It is an arithmetic number, because the mean of its divisors is an integer number (11784969).

Almost surely, 2^40405604 is an apocalyptic number.

It is an amenable number.

40405604 is a deficient number, since it is larger than the sum of its proper divisors (30304210).

40405604 is a wasteful number, since it uses less digits than its factorization.

40405604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10101405 (or 10101403 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 40405604 is about 6356.5402539432. The cubic root of 40405604 is about 343.1472591711.

The spelling of 40405604 in words is "forty million, four hundred five thousand, six hundred four".