40405168 has 10 divisors (see below), whose sum is σ = 78285044. Its totient is φ = 20202576.

The previous prime is 40405163. The next prime is 40405171. The reversal of 40405168 is 86150404.

It is a super-2 number, since 2×40405168² = 3265155202216448, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40405163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1262646 + ... + 1262677.

Almost surely, 2^40405168 is an apocalyptic number.

It is an amenable number.

40405168 is a deficient number, since it is larger than the sum of its proper divisors (37879876).

40405168 is a wasteful number, since it uses less digits than its factorization.

40405168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2525331 (or 2525325 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 40405168 is about 6356.5059584649. The cubic root of 40405168 is about 343.1460249138.

The spelling of 40405168 in words is "forty million, four hundred five thousand, one hundred sixty-eight".