208764428 has 6 divisors (see below), whose sum is σ = 365337756. Its totient is φ = 104382212.

The previous prime is 208764421. The next prime is 208764431. The reversal of 208764428 is 824467802.

208764428 is digitally balanced in base 2, 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 (208764421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26095550 + ... + 26095557.

It is an arithmetic number, because the mean of its divisors is an integer number (60889626).

Almost surely, 2^208764428 is an apocalyptic number.

It is an amenable number.

208764428 is a deficient number, since it is larger than the sum of its proper divisors (156573328).

208764428 is a wasteful number, since it uses less digits than its factorization.

208764428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52191111 (or 52191109 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 41.

The square root of 208764428 is about 14448.6825697016. The cubic root of 208764428 is about 593.2241644315.

The spelling of 208764428 in words is "two hundred eight million, seven hundred sixty-four thousand, four hundred twenty-eight".