68991828 has 24 divisors (see below), whose sum is σ = 165332832. Its totient is φ = 22375584.

The previous prime is 68991799. The next prime is 68991847. The reversal of 68991828 is 82819986.

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 7 ways as a sum of consecutive naturals, for example, 77250 + ... + 78137.

It is an arithmetic number, because the mean of its divisors is an integer number (6888868).

Almost surely, 2^68991828 is an apocalyptic number.

It is an amenable number.

68991828 is an abundant number, since it is smaller than the sum of its proper divisors (96341004).

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

68991828 is a wasteful number, since it uses less digits than its factorization.

68991828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155431 (or 155429 counting only the distinct ones).

The product of its digits is 497664, while the sum is 51.

The square root of 68991828 is about 8306.1319517571. The cubic root of 68991828 is about 410.1404000620.

The spelling of 68991828 in words is "sixty-eight million, nine hundred ninety-one thousand, eight hundred twenty-eight".