208045992 has 128 divisors (see below), whose sum is σ = 655349760. Its totient is φ = 53464320.

The previous prime is 208045979. The next prime is 208046009. The reversal of 208045992 is 299540802.

It is a self number, because there is not a number n which added to its sum of digits gives 208045992.

It is an unprimeable number.

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, 189798 + ... + 190890.

It is an arithmetic number, because the mean of its divisors is an integer number (5119920).

Almost surely, 2^208045992 is an apocalyptic number.

208045992 is a gapful number since it is divisible by the number (22) 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 208045992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (327674880).

208045992 is an abundant number, since it is smaller than the sum of its proper divisors (447303768).

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

208045992 is a wasteful number, since it uses less digits than its factorization.

208045992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1223 (or 1219 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 208045992 is about 14423.7994994384. The cubic root of 208045992 is about 592.5428806937.

It can be divided in two parts, 20804 and 5992, that added together give a triangular number (26796 = T₂₃₁).

The spelling of 208045992 in words is "two hundred eight million, forty-five thousand, nine hundred ninety-two".