40050905 has 4 divisors (see below), whose sum is σ = 48061092. Its totient is φ = 32040720.

The previous prime is 40050883. The next prime is 40050919. The reversal of 40050905 is 50905004.

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 6190144 + 33860761 = 2488^2 + 5819^2 .

It is a de Polignac number, because none of the positive numbers 2^k-40050905 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 4005086 + ... + 4005095.

It is an arithmetic number, because the mean of its divisors is an integer number (12015273).

Almost surely, 2^40050905 is an apocalyptic number.

It is an amenable number.

40050905 is a deficient number, since it is larger than the sum of its proper divisors (8010187).

40050905 is an equidigital number, since it uses as much as digits as its factorization.

40050905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8010186.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 40050905 is about 6328.5784343721. The cubic root of 40050905 is about 342.1402050451.

Adding to 40050905 its reverse (50905004), we get a palindrome (90955909).

The spelling of 40050905 in words is "forty million, fifty thousand, nine hundred five".