2155843790 has 8 divisors (see below), whose sum is σ = 3880518840. Its totient is φ = 862337512.

The previous prime is 2155843783. The next prime is 2155843793. The reversal of 2155843790 is 973485512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155843793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107792180 + ... + 107792199.

It is an arithmetic number, because the mean of its divisors is an integer number (485064855).

Almost surely, 2^2155843790 is an apocalyptic number.

2155843790 is a deficient number, since it is larger than the sum of its proper divisors (1724675050).

2155843790 is a wasteful number, since it uses less digits than its factorization.

2155843790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215584386.

The product of its (nonzero) digits is 302400, while the sum is 44.

The square root of 2155843790 is about 46431.0649242509. The cubic root of 2155843790 is about 1291.8311813949.

The spelling of 2155843790 in words is "two billion, one hundred fifty-five million, eight hundred forty-three thousand, seven hundred ninety".