208938444 has 72 divisors (see below), whose sum is σ = 577145520. Its totient is φ = 58439040.

The previous prime is 208938439. The next prime is 208938467. The reversal of 208938444 is 444839802.

It is a super-2 number, since 2×208938444² = 87310546762282272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 208938396 and 208938405.

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 23 ways as a sum of consecutive naturals, for example, 13342 + ... + 24410.

It is an arithmetic number, because the mean of its divisors is an integer number (8015910).

Almost surely, 2^208938444 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 208938444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288572760).

208938444 is an abundant number, since it is smaller than the sum of its proper divisors (368207076).

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

208938444 is a wasteful number, since it uses less digits than its factorization.

208938444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11111 (or 11098 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 42.

The square root of 208938444 is about 14454.7031792424. The cubic root of 208938444 is about 593.3889463786.

The spelling of 208938444 in words is "two hundred eight million, nine hundred thirty-eight thousand, four hundred forty-four".