40355905 has 16 divisors (see below), whose sum is σ = 51336000. Its totient is φ = 30369600.

The previous prime is 40355899. The next prime is 40355911. The reversal of 40355905 is 50955304.

It is an interprime number because it is at equal distance from previous prime (40355899) and next prime (40355911).

It is a de Polignac number, because none of the positive numbers 2^k-40355905 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12730 + ... + 15580.

It is an arithmetic number, because the mean of its divisors is an integer number (3208500).

Almost surely, 2^40355905 is an apocalyptic number.

It is an amenable number.

40355905 is a deficient number, since it is larger than the sum of its proper divisors (10980095).

40355905 is a wasteful number, since it uses less digits than its factorization.

40355905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3024.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 40355905 is about 6352.6297704179. The cubic root of 40355905 is about 343.0065107690.

The spelling of 40355905 in words is "forty million, three hundred fifty-five thousand, nine hundred five".