205870860 has 144 divisors (see below), whose sum is σ = 680193696. Its totient is φ = 50098176.

The previous prime is 205870843. The next prime is 205870891. The reversal of 205870860 is 68078502.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226527 + ... + 227433.

Almost surely, 2^205870860 is an apocalyptic number.

205870860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205870860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (340096848).

205870860 is an abundant number, since it is smaller than the sum of its proper divisors (474322836).

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

205870860 is a wasteful number, since it uses less digits than its factorization.

205870860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1032 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 205870860 is about 14348.2005840454. The cubic root of 205870860 is about 590.4706194307.

The spelling of 205870860 in words is "two hundred five million, eight hundred seventy thousand, eight hundred sixty".