1840491 has 12 divisors (see below), whose sum is σ = 2730832. Its totient is φ = 1193616.

The previous prime is 1840469. The next prime is 1840493. The reversal of 1840491 is 1940481.

It is not a de Polignac number, because 1840491 - 2⁵ = 1840459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1840493) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2431 + ... + 3096.

2^1840491 is an apocalyptic number.

1840491 is a deficient number, since it is larger than the sum of its proper divisors (890341).

1840491 is a wasteful number, since it uses less digits than its factorization.

1840491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5570 (or 5567 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 1840491 is about 1356.6469695540. The cubic root of 1840491 is about 122.5494122472.

The spelling of 1840491 in words is "one million, eight hundred forty thousand, four hundred ninety-one".