40161018 has 8 divisors (see below), whose sum is σ = 80322048. Its totient is φ = 13387004.

The previous prime is 40160999. The next prime is 40161019. The reversal of 40161018 is 81016104.

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

40161018 is an admirable number.

It is a super-2 number, since 2×40161018² = 3225814733592648, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40160985 and 40161003.

It is not an unprimeable number, because it can be changed into a prime (40161019) 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, 3346746 + ... + 3346757.

It is an arithmetic number, because the mean of its divisors is an integer number (10040256).

Almost surely, 2^40161018 is an apocalyptic number.

40161018 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40161018 is a wasteful number, since it uses less digits than its factorization.

40161018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6693508.

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 40161018 is about 6337.2721260807. The cubic root of 40161018 is about 342.4534698009.

The spelling of 40161018 in words is "forty million, one hundred sixty-one thousand, eighteen".