40205799 has 12 divisors (see below), whose sum is σ = 61491456. Its totient is φ = 25227072.

The previous prime is 40205797. The next prime is 40205813. The reversal of 40205799 is 99750204.

It is not a de Polignac number, because 40205799 - 2¹ = 40205797 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40205797) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 131239 + ... + 131544.

It is an arithmetic number, because the mean of its divisors is an integer number (5124288).

Almost surely, 2^40205799 is an apocalyptic number.

40205799 is a deficient number, since it is larger than the sum of its proper divisors (21285657).

40205799 is a wasteful number, since it uses less digits than its factorization.

40205799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262806 (or 262803 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The square root of 40205799 is about 6340.8042865239. The cubic root of 40205799 is about 342.5807052254.

The spelling of 40205799 in words is "forty million, two hundred five thousand, seven hundred ninety-nine".