40505638 has 8 divisors (see below), whose sum is σ = 60933600. Its totient is φ = 20194440.

The previous prime is 40505629. The next prime is 40505651. The reversal of 40505638 is 83650504.

It is a sphenic number, since it is the product of 3 distinct primes.

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, 28318 + ... + 29713.

It is an arithmetic number, because the mean of its divisors is an integer number (7616700).

Almost surely, 2^40505638 is an apocalyptic number.

40505638 is a deficient number, since it is larger than the sum of its proper divisors (20427962).

40505638 is a wasteful number, since it uses less digits than its factorization.

40505638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58382.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 40505638 is about 6364.4039783785. The cubic root of 40505638 is about 343.4302075794.

The spelling of 40505638 in words is "forty million, five hundred five thousand, six hundred thirty-eight".