206499904 has 56 divisors (see below), whose sum is σ = 464555840. Its totient is φ = 90284544.

The previous prime is 206499877. The next prime is 206499919. The reversal of 206499904 is 409994602.

It is a super-3 number, since 3×206499904³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9277 + ... + 22339.

It is an arithmetic number, because the mean of its divisors is an integer number (8295640).

Almost surely, 2^206499904 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 206499904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232277920).

206499904 is an abundant number, since it is smaller than the sum of its proper divisors (258055936).

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

206499904 is a wasteful number, since it uses less digits than its factorization.

206499904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13107 (or 13097 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 43.

The square root of 206499904 is about 14370.1045229323. The cubic root of 206499904 is about 591.0714076050.

The spelling of 206499904 in words is "two hundred six million, four hundred ninety-nine thousand, nine hundred four".