4040905 has 8 divisors (see below), whose sum is σ = 5289984. Its totient is φ = 2938800.

The previous prime is 4040903. The next prime is 4040921. The reversal of 4040905 is 5090404.

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

It is not a de Polignac number, because 4040905 - 2¹ = 4040903 is a prime.

It is a Duffinian number.

4040905 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4040903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36681 + ... + 36790.

It is an arithmetic number, because the mean of its divisors is an integer number (661248).

Almost surely, 2^4040905 is an apocalyptic number.

It is an amenable number.

4040905 is a deficient number, since it is larger than the sum of its proper divisors (1249079).

4040905 is a wasteful number, since it uses less digits than its factorization.

4040905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73487.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 4040905 is about 2010.2002387822. The cubic root of 4040905 is about 159.2793764457.

The spelling of 4040905 in words is "four million, forty thousand, nine hundred five".