40636999 has 8 divisors (see below), whose sum is σ = 44694720. Its totient is φ = 36712416.

The previous prime is 40636997. The next prime is 40637039. The reversal of 40636999 is 99963604.

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

It is not a de Polignac number, because 40636999 - 2¹ = 40636997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40636997) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 32644 + ... + 33865.

It is an arithmetic number, because the mean of its divisors is an integer number (5586840).

Almost surely, 2^40636999 is an apocalyptic number.

40636999 is a deficient number, since it is larger than the sum of its proper divisors (4057721).

40636999 is a wasteful number, since it uses less digits than its factorization.

40636999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66569.

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 40636999 is about 6374.7156014994. The cubic root of 40636999 is about 343.8010584653.

The spelling of 40636999 in words is "forty million, six hundred thirty-six thousand, nine hundred ninety-nine".