206861610 has 32 divisors (see below), whose sum is σ = 525673152. Its totient is φ = 51918080.

The previous prime is 206861591. The next prime is 206861639. The reversal of 206861610 is 16168602.

206861610 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202296 + ... + 203315.

It is an arithmetic number, because the mean of its divisors is an integer number (16427286).

Almost surely, 2^206861610 is an apocalyptic number.

206861610 is an abundant number, since it is smaller than the sum of its proper divisors (318811542).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206861610 is a wasteful number, since it uses less digits than its factorization.

206861610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 405638.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 206861610 is about 14382.6843808797. The cubic root of 206861610 is about 591.4163139290.

The spelling of 206861610 in words is "two hundred six million, eight hundred sixty-one thousand, six hundred ten".