40649959 has 16 divisors (see below), whose sum is σ = 48947200. Its totient is φ = 33710040.

The previous prime is 40649933. The next prime is 40649963. The reversal of 40649959 is 95994604.

40649959 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40649959 - 2⁹ = 40649447 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 (40649989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8722 + ... + 12544.

It is an arithmetic number, because the mean of its divisors is an integer number (3059200).

Almost surely, 2^40649959 is an apocalyptic number.

40649959 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

40649959 is a deficient number, since it is larger than the sum of its proper divisors (8297241).

40649959 is an equidigital number, since it uses as much as digits as its factorization.

40649959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875 (or 3861 counting only the distinct ones).

The product of its (nonzero) digits is 349920, while the sum is 46.

The square root of 40649959 is about 6375.7320364018. The cubic root of 40649959 is about 343.8376030613.

The spelling of 40649959 in words is "forty million, six hundred forty-nine thousand, nine hundred fifty-nine".