205810470 has 160 divisors (see below), whose sum is σ = 597991680. Its totient is φ = 50621760.

The previous prime is 205810411. The next prime is 205810471. The reversal of 205810470 is 74018502.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205810471) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 661615 + ... + 661925.

It is an arithmetic number, because the mean of its divisors is an integer number (3737448).

Almost surely, 2^205810470 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205810470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298995840).

205810470 is an abundant number, since it is smaller than the sum of its proper divisors (392181210).

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

205810470 is a wasteful number, since it uses less digits than its factorization.

205810470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 205810470 is about 14346.0959846224. The cubic root of 205810470 is about 590.4128777183.

Adding to 205810470 its reverse (74018502), we get a palindrome (279828972).

The spelling of 205810470 in words is "two hundred five million, eight hundred ten thousand, four hundred seventy".