219728408 has 16 divisors (see below), whose sum is σ = 414617280. Its totient is φ = 109163808.

The previous prime is 219728371. The next prime is 219728419. The reversal of 219728408 is 804827912.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86216 + ... + 88727.

It is an arithmetic number, because the mean of its divisors is an integer number (25913580).

Almost surely, 2^219728408 is an apocalyptic number.

It is an amenable number.

219728408 is a deficient number, since it is larger than the sum of its proper divisors (194888872).

219728408 is a wasteful number, since it uses less digits than its factorization.

219728408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175106 (or 175102 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 219728408 is about 14823.2387823984. The cubic root of 219728408 is about 603.4325547943.

The spelling of 219728408 in words is "two hundred nineteen million, seven hundred twenty-eight thousand, four hundred eight".