208196428 has 24 divisors (see below), whose sum is σ = 397880784. Its totient is φ = 94536000.

The previous prime is 208196419. The next prime is 208196441. The reversal of 208196428 is 824691802.

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 7 ways as a sum of consecutive naturals, for example, 55426 + ... + 59062.

It is an arithmetic number, because the mean of its divisors is an integer number (16578366).

Almost surely, 2^208196428 is an apocalyptic number.

It is an amenable number.

208196428 is a deficient number, since it is larger than the sum of its proper divisors (189684356).

208196428 is a wasteful number, since it uses less digits than its factorization.

208196428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4953 (or 4951 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 208196428 is about 14429.0134104865. The cubic root of 208196428 is about 592.6856669164.

The spelling of 208196428 in words is "two hundred eight million, one hundred ninety-six thousand, four hundred twenty-eight".