1840115813 has 8 divisors (see below), whose sum is σ = 1913779296. Its totient is φ = 1767855600.

The previous prime is 1840115791. The next prime is 1840115833. The reversal of 1840115813 is 3185110481.

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-1840115813 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1840115813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1840115833) 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, 348143 + ... + 353388.

It is an arithmetic number, because the mean of its divisors is an integer number (239222412).

Almost surely, 2^1840115813 is an apocalyptic number.

It is an amenable number.

1840115813 is a deficient number, since it is larger than the sum of its proper divisors (73663483).

1840115813 is an equidigital number, since it uses as much as digits as its factorization.

1840115813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701635.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 1840115813 is about 42896.5711100549. The cubic root of 1840115813 is about 1225.4108438412.

The spelling of 1840115813 in words is "one billion, eight hundred forty million, one hundred fifteen thousand, eight hundred thirteen".