40006631 has 8 divisors (see below), whose sum is σ = 47298720. Its totient is φ = 33108768.

The previous prime is 40006621. The next prime is 40006663. The reversal of 40006631 is 13660004.

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

It is not a de Polignac number, because 40006631 - 2²² = 35812327 is a prime.

It is a super-2 number, since 2×40006631² = 3201061047940322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40006621) 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, 98336 + ... + 98741.

It is an arithmetic number, because the mean of its divisors is an integer number (5912340).

Almost surely, 2^40006631 is an apocalyptic number.

40006631 is a deficient number, since it is larger than the sum of its proper divisors (7292089).

40006631 is a wasteful number, since it uses less digits than its factorization.

40006631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197113.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 40006631 is about 6325.0795251918. The cubic root of 40006631 is about 342.0140863753.

Adding to 40006631 its reverse (13660004), we get a palindrome (53666635).

The spelling of 40006631 in words is "forty million, six thousand, six hundred thirty-one".