828728408 has 16 divisors (see below), whose sum is σ = 1591765560. Its totient is φ = 404257600.

The previous prime is 828728399. The next prime is 828728413. The reversal of 828728408 is 804827828.

It is a happy number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 1262978 + ... + 1263633.

Almost surely, 2^828728408 is an apocalyptic number.

It is an amenable number.

828728408 is a deficient number, since it is larger than the sum of its proper divisors (763037152).

828728408 is a wasteful number, since it uses less digits than its factorization.

828728408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2526658 (or 2526654 counting only the distinct ones).

The product of its (nonzero) digits is 458752, while the sum is 47.

The square root of 828728408 is about 28787.6433213975. The cubic root of 828728408 is about 939.2994659856.

The spelling of 828728408 in words is "eight hundred twenty-eight million, seven hundred twenty-eight thousand, four hundred eight".