1840040311 has 8 divisors (see below), whose sum is σ = 1844592048. Its totient is φ = 1835496000.

The previous prime is 1840040297. The next prime is 1840040317. The reversal of 1840040311 is 1130400481.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1840040311 is a prime.

It is a super-2 number, since 2×1840040311² = 6771496692209953442, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840040317) 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 7 ways as a sum of consecutive naturals, for example, 1241691 + ... + 1243171.

It is an arithmetic number, because the mean of its divisors is an integer number (230574006).

Almost surely, 2^1840040311 is an apocalyptic number.

1840040311 is a deficient number, since it is larger than the sum of its proper divisors (4551737).

1840040311 is a wasteful number, since it uses less digits than its factorization.

1840040311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3713.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 1840040311 is about 42895.6910539975. The cubic root of 1840040311 is about 1225.3940836217.

Adding to 1840040311 its reverse (1130400481), we get a palindrome (2970440792).

The spelling of 1840040311 in words is "one billion, eight hundred forty million, forty thousand, three hundred eleven".