208621028 has 36 divisors (see below), whose sum is σ = 463306032. Its totient is φ = 81280080.

The previous prime is 208621027. The next prime is 208621031. The reversal of 208621028 is 820126802.

208621028 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (208621027) 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, 46226 + ... + 50537.

It is an arithmetic number, because the mean of its divisors is an integer number (12869612).

Almost surely, 2^208621028 is an apocalyptic number.

208621028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

208621028 is an abundant number, since it is smaller than the sum of its proper divisors (254685004).

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

208621028 is a wasteful number, since it uses less digits than its factorization.

208621028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96792 (or 96783 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 208621028 is about 14443.7193270985. The cubic root of 208621028 is about 593.0883050305.

The spelling of 208621028 in words is "two hundred eight million, six hundred twenty-one thousand, twenty-eight".