2105843390 has 32 divisors (see below), whose sum is σ = 4341484224. Its totient is φ = 720426240.

The previous prime is 2105843357. The next prime is 2105843401. The reversal of 2105843390 is 933485012.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2105843390.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 359 + ... + 64898.

It is an arithmetic number, because the mean of its divisors is an integer number (135671382).

Almost surely, 2^2105843390 is an apocalyptic number.

2105843390 is an abundant number, since it is smaller than the sum of its proper divisors (2235640834).

2105843390 is a wasteful number, since it uses less digits than its factorization.

2105843390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65732.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2105843390 is about 45889.4692712827. The cubic root of 2105843390 is about 1281.7658306412.

The spelling of 2105843390 in words is "two billion, one hundred five million, eight hundred forty-three thousand, three hundred ninety".