40937809 has 12 divisors (see below), whose sum is σ = 45256708. Its totient is φ = 37002240.

The previous prime is 40937807. The next prime is 40937839. The reversal of 40937809 is 90873904.

It can be written as a sum of positive squares in 2 ways, for example, as 4601025 + 36336784 = 2145^2 + 6028^2 .

It is not a de Polignac number, because 40937809 - 2¹ = 40937807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40937807) 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 11 ways as a sum of consecutive naturals, for example, 22477 + ... + 24229.

Almost surely, 2^40937809 is an apocalyptic number.

It is an amenable number.

40937809 is a deficient number, since it is larger than the sum of its proper divisors (4318899).

40937809 is a wasteful number, since it uses less digits than its factorization.

40937809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1968 (or 1957 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 40937809 is about 6398.2660932475. The cubic root of 40937809 is about 344.6472877792.

The spelling of 40937809 in words is "forty million, nine hundred thirty-seven thousand, eight hundred nine".