206315904 has 32 divisors (see below), whose sum is σ = 548027640. Its totient is φ = 68771840.

The previous prime is 206315903. The next prime is 206315929. The reversal of 206315904 is 409513602.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (206315903) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 268257 + ... + 269024.

Almost surely, 2^206315904 is an apocalyptic number.

206315904 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

206315904 is an abundant number, since it is smaller than the sum of its proper divisors (341711736).

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

206315904 is an equidigital number, since it uses as much as digits as its factorization.

206315904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 537298 (or 537286 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 206315904 is about 14363.7009158503. The cubic root of 206315904 is about 590.8957990369.

The spelling of 206315904 in words is "two hundred six million, three hundred fifteen thousand, nine hundred four".