208728036 has 96 divisors (see below), whose sum is σ = 616089600. Its totient is φ = 60492960.

The previous prime is 208727983. The next prime is 208728049. The reversal of 208728036 is 630827802.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23505 + ... + 31143.

It is an arithmetic number, because the mean of its divisors is an integer number (6417600).

Almost surely, 2^208728036 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 208728036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (308044800).

208728036 is an abundant number, since it is smaller than the sum of its proper divisors (407361564).

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

208728036 is a wasteful number, since it uses less digits than its factorization.

208728036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7686 (or 7678 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 208728036 is about 14447.4231612423. The cubic root of 208728036 is about 593.1896919744.

The spelling of 208728036 in words is "two hundred eight million, seven hundred twenty-eight thousand, thirty-six".