68909828 has 24 divisors (see below), whose sum is σ = 130095000. Its totient is φ = 31749120.

The previous prime is 68909801. The next prime is 68909833. The reversal of 68909828 is 82890986.

It can be written as a sum of positive squares in 4 ways, for example, as 3655744 + 65254084 = 1912^2 + 8078^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54548 + ... + 55796.

It is an arithmetic number, because the mean of its divisors is an integer number (5420625).

Almost surely, 2^68909828 is an apocalyptic number.

It is an amenable number.

68909828 is a deficient number, since it is larger than the sum of its proper divisors (61185172).

68909828 is a wasteful number, since it uses less digits than its factorization.

68909828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2327 (or 2325 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 68909828 is about 8301.1943718961. The cubic root of 68909828 is about 409.9778453228.

The spelling of 68909828 in words is "sixty-eight million, nine hundred nine thousand, eight hundred twenty-eight".