40723665 has 16 divisors (see below), whose sum is σ = 65769408. Its totient is φ = 21515456.

The previous prime is 40723651. The next prime is 40723673. The reversal of 40723665 is 56632704.

40723665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 40723665 - 2⁶ = 40723601 is a prime.

It is an unprimeable number.

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, 11082 + ... + 14291.

It is an arithmetic number, because the mean of its divisors is an integer number (4110588).

Almost surely, 2^40723665 is an apocalyptic number.

It is an amenable number.

40723665 is a deficient number, since it is larger than the sum of its proper divisors (25045743).

40723665 is a wasteful number, since it uses less digits than its factorization.

40723665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25488.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 40723665 is about 6381.5096176375. The cubic root of 40723665 is about 344.0452916073.

The spelling of 40723665 in words is "forty million, seven hundred twenty-three thousand, six hundred sixty-five".