2106809590 has 8 divisors (see below), whose sum is σ = 3792257280. Its totient is φ = 842723832.

The previous prime is 2106809587. The next prime is 2106809633. The reversal of 2106809590 is 959086012.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105340470 + ... + 105340489.

It is an arithmetic number, because the mean of its divisors is an integer number (474032160).

Almost surely, 2^2106809590 is an apocalyptic number.

2106809590 is a deficient number, since it is larger than the sum of its proper divisors (1685447690).

2106809590 is a wasteful number, since it uses less digits than its factorization.

2106809590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210680966.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 2106809590 is about 45899.9955337688. The cubic root of 2106809590 is about 1281.9618333122.

The spelling of 2106809590 in words is "two billion, one hundred six million, eight hundred nine thousand, five hundred ninety".