206388204 has 72 divisors (see below), whose sum is σ = 543178944. Its totient is φ = 60487200.

The previous prime is 206388199. The next prime is 206388209. The reversal of 206388204 is 402883602.

It is an interprime number because it is at equal distance from previous prime (206388199) and next prime (206388209).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (206388209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126039 + ... + 127665.

It is an arithmetic number, because the mean of its divisors is an integer number (7544152).

Almost surely, 2^206388204 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 206388204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271589472).

206388204 is an abundant number, since it is smaller than the sum of its proper divisors (336790740).

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

206388204 is a wasteful number, since it uses less digits than its factorization.

206388204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1707 (or 1674 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The square root of 206388204 is about 14366.2174562409. The cubic root of 206388204 is about 590.9648141993.

The spelling of 206388204 in words is "two hundred six million, three hundred eighty-eight thousand, two hundred four".