40018196 has 24 divisors (see below), whose sum is σ = 71531880. Its totient is φ = 19584000.

The previous prime is 40018193. The next prime is 40018211. The reversal of 40018196 is 69181004.

40018196 = T₂₃₁ + T₂₃₂ + ... + T₆₃₁.

It can be written as a sum of positive squares in 4 ways, for example, as 15713296 + 24304900 = 3964^2 + 4930^2 .

It is a super-2 number, since 2×40018196² = 3202912022188832, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40018193) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97640 + ... + 98048.

It is an arithmetic number, because the mean of its divisors is an integer number (2980495).

Almost surely, 2^40018196 is an apocalyptic number.

It is an amenable number.

40018196 is a deficient number, since it is larger than the sum of its proper divisors (31513684).

40018196 is a wasteful number, since it uses less digits than its factorization.

40018196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875 (or 873 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 40018196 is about 6325.9936768859. The cubic root of 40018196 is about 342.0470393445.

The spelling of 40018196 in words is "forty million, eighteen thousand, one hundred ninety-six".