40009436 has 24 divisors (see below), whose sum is σ = 71942640. Its totient is φ = 19458432.

The previous prime is 40009429. The next prime is 40009439. The reversal of 40009436 is 63490004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40009439) 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, 78350 + ... + 78858.

It is an arithmetic number, because the mean of its divisors is an integer number (2997610).

Almost surely, 2^40009436 is an apocalyptic number.

It is an amenable number.

40009436 is a deficient number, since it is larger than the sum of its proper divisors (31933204).

40009436 is a wasteful number, since it uses less digits than its factorization.

40009436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 40009436 is about 6325.3012576477. The cubic root of 40009436 is about 342.0220794427.

The spelling of 40009436 in words is "forty million, nine thousand, four hundred thirty-six".