40329918 has 12 divisors (see below), whose sum is σ = 87381528. Its totient is φ = 13443300.

The previous prime is 40329881. The next prime is 40329929. The reversal of 40329918 is 81992304.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1120258 + ... + 1120293.

It is an arithmetic number, because the mean of its divisors is an integer number (7281794).

Almost surely, 2^40329918 is an apocalyptic number.

40329918 is an abundant number, since it is smaller than the sum of its proper divisors (47051610).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40329918 is a wasteful number, since it uses less digits than its factorization.

40329918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2240559 (or 2240556 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 40329918 is about 6350.5840676272. The cubic root of 40329918 is about 342.9328691363.

The spelling of 40329918 in words is "forty million, three hundred twenty-nine thousand, nine hundred eighteen".