1840640841 has 80 divisors (see below), whose sum is σ = 3089856000. Its totient is φ = 1084285440.

The previous prime is 1840640831. The next prime is 1840640909. The reversal of 1840640841 is 1480460481.

1840640841 is a `hidden beast` number, since 1 + 8 + 4 + 0 + 640 + 8 + 4 + 1 = 666.

It is not a de Polignac number, because 1840640841 - 2⁶ = 1840640777 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1840640796 and 1840640805.

It is not an unprimeable number, because it can be changed into a prime (1840640801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3688410 + ... + 3688908.

It is an arithmetic number, because the mean of its divisors is an integer number (38623200).

Almost surely, 2^1840640841 is an apocalyptic number.

It is an amenable number.

1840640841 is a deficient number, since it is larger than the sum of its proper divisors (1249215159).

1840640841 is a wasteful number, since it uses less digits than its factorization.

1840640841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668 (or 659 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 1840640841 is about 42902.6903701854. The cubic root of 1840640841 is about 1225.5273788657.

It can be divided in two parts, 1840640 and 841, that added together give a palindrome (1841481).

The spelling of 1840640841 in words is "one billion, eight hundred forty million, six hundred forty thousand, eight hundred forty-one".