4040491 has 12 divisors (see below), whose sum is σ = 5062512. Its totient is φ = 3196368.

The previous prime is 4040473. The next prime is 4040501. The reversal of 4040491 is 1940404.

It is a happy number.

It is not a de Polignac number, because 4040491 - 2⁵ = 4040459 is a prime.

4040491 is a lucky number.

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 11 ways as a sum of consecutive naturals, for example, 2535 + ... + 3808.

It is an arithmetic number, because the mean of its divisors is an integer number (421876).

Almost surely, 2^4040491 is an apocalyptic number.

4040491 is a deficient number, since it is larger than the sum of its proper divisors (1022021).

4040491 is a wasteful number, since it uses less digits than its factorization.

4040491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6370 (or 6363 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 4040491 is about 2010.0972613284. The cubic root of 4040491 is about 159.2739367473.

Adding to 4040491 its reverse (1940404), we get a palindrome (5980895).

The spelling of 4040491 in words is "four million, forty thousand, four hundred ninety-one".