40305688 has 16 divisors (see below), whose sum is σ = 79551000. Its totient is φ = 19092096.

The previous prime is 40305667. The next prime is 40305701. The reversal of 40305688 is 88650304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132433 + ... + 132736.

Almost surely, 2^40305688 is an apocalyptic number.

It is an amenable number.

40305688 is a deficient number, since it is larger than the sum of its proper divisors (39245312).

40305688 is a wasteful number, since it uses less digits than its factorization.

40305688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265194 (or 265190 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The square root of 40305688 is about 6348.6760824600. The cubic root of 40305688 is about 342.8641779641.

The spelling of 40305688 in words is "forty million, three hundred five thousand, six hundred eighty-eight".