40163906 has 8 divisors (see below), whose sum is σ = 60274380. Its totient is φ = 20072448.

The previous prime is 40163899. The next prime is 40163933. The reversal of 40163906 is 60936104.

It can be written as a sum of positive squares in 2 ways, for example, as 39753025 + 410881 = 6305^2 + 641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40163906² = 3226278690353672, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3170 + ... + 9506.

Almost surely, 2^40163906 is an apocalyptic number.

It is a pronic number, being equal to 6337×6338.

40163906 is a deficient number, since it is larger than the sum of its proper divisors (20110474).

40163906 is a wasteful number, since it uses less digits than its factorization.

40163906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9508.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 40163906 is about 6337.4999802761. The cubic root of 40163906 is about 342.4616782741.

The spelling of 40163906 in words is "forty million, one hundred sixty-three thousand, nine hundred six".