205706412 has 48 divisors (see below), whose sum is σ = 539330400. Its totient is φ = 67795200.

The previous prime is 205706401. The next prime is 205706429. The reversal of 205706412 is 214607502.

205706412 is a `hidden beast` number, since 20 + 570 + 64 + 12 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1089 + ... + 20312.

It is an arithmetic number, because the mean of its divisors is an integer number (11236050).

Almost surely, 2^205706412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 205706412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269665200).

205706412 is an abundant number, since it is smaller than the sum of its proper divisors (333623988).

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

205706412 is a wasteful number, since it uses less digits than its factorization.

205706412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21503 (or 21495 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 205706412 is about 14342.4688251361. The cubic root of 205706412 is about 590.3133564770.

The spelling of 205706412 in words is "two hundred five million, seven hundred six thousand, four hundred twelve".