4040409 has 8 divisors (see below), whose sum is σ = 5512672. Its totient is φ = 2630880.

The previous prime is 4040401. The next prime is 4040411. The reversal of 4040409 is 9040404.

It is a happy number.

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

It is not a de Polignac number, because 4040409 - 2³ = 4040401 is a prime.

It is a Duffinian number.

It is a plaindrome in base 6.

It is a zygodrome in base 6.

It is not an unprimeable number, because it can be changed into a prime (4040401) 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, 15532 + ... + 15789.

It is an arithmetic number, because the mean of its divisors is an integer number (689084).

Almost surely, 2^4040409 is an apocalyptic number.

It is an amenable number.

4040409 is a deficient number, since it is larger than the sum of its proper divisors (1472263).

4040409 is a wasteful number, since it uses less digits than its factorization.

4040409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31367.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 4040409 is about 2010.0768642020. The cubic root of 4040409 is about 159.2728592750.

The spelling of 4040409 in words is "four million, forty thousand, four hundred nine".