208985004 has 36 divisors (see below), whose sum is σ = 529532640. Its totient is φ = 69494880.

The previous prime is 208985003. The next prime is 208985011. The reversal of 208985004 is 400589802.

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 208985004.

It is not an unprimeable number, because it can be changed into a prime (208985003) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8782 + ... + 22250.

It is an arithmetic number, because the mean of its divisors is an integer number (14709240).

Almost surely, 2^208985004 is an apocalyptic number.

It is an amenable number.

208985004 is an abundant number, since it is smaller than the sum of its proper divisors (320547636).

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

208985004 is a wasteful number, since it uses less digits than its factorization.

208985004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13910 (or 13905 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 208985004 is about 14456.3136379922. The cubic root of 208985004 is about 593.4330201847.

The spelling of 208985004 in words is "two hundred eight million, nine hundred eighty-five thousand, four".