206228904 has 128 divisors (see below), whose sum is σ = 629130240. Its totient is φ = 54991872.

The previous prime is 206228899. The next prime is 206228909. The reversal of 206228904 is 409822602.

It is an interprime number because it is at equal distance from previous prime (206228899) and next prime (206228909).

It is not an unprimeable number, because it can be changed into a prime (206228909) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 465307 + ... + 465749.

It is an arithmetic number, because the mean of its divisors is an integer number (4915080).

Almost surely, 2^206228904 is an apocalyptic number.

206228904 is a gapful number since it is divisible by the number (24) 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 206228904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314565120).

206228904 is an abundant number, since it is smaller than the sum of its proper divisors (422901336).

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

206228904 is a wasteful number, since it uses less digits than its factorization.

206228904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639 (or 635 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 206228904 is about 14360.6721291171. The cubic root of 206228904 is about 590.8127303686.

The spelling of 206228904 in words is "two hundred six million, two hundred twenty-eight thousand, nine hundred four".