40635905 has 4 divisors (see below), whose sum is σ = 48763092. Its totient is φ = 32508720.

The previous prime is 40635901. The next prime is 40635911. The reversal of 40635905 is 50953604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11723776 + 28912129 = 3424^2 + 5377^2 .

It is not a de Polignac number, because 40635905 - 2² = 40635901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40635901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4063586 + ... + 4063595.

It is an arithmetic number, because the mean of its divisors is an integer number (12190773).

Almost surely, 2^40635905 is an apocalyptic number.

It is an amenable number.

40635905 is a deficient number, since it is larger than the sum of its proper divisors (8127187).

40635905 is an equidigital number, since it uses as much as digits as its factorization.

40635905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8127186.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 40635905 is about 6374.6297931723. The cubic root of 40635905 is about 343.7979732495.

The spelling of 40635905 in words is "forty million, six hundred thirty-five thousand, nine hundred five".