68505820 has 12 divisors (see below), whose sum is σ = 143862264. Its totient is φ = 27402320.

The previous prime is 68505817. The next prime is 68505821. The reversal of 68505820 is 2850586.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68505821) by changing a digit.

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, 1712626 + ... + 1712665.

It is an arithmetic number, because the mean of its divisors is an integer number (11988522).

Almost surely, 2^68505820 is an apocalyptic number.

It is an amenable number.

68505820 is an abundant number, since it is smaller than the sum of its proper divisors (75356444).

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

68505820 is a wasteful number, since it uses less digits than its factorization.

68505820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3425300 (or 3425298 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 34.

The square root of 68505820 is about 8276.8242702138. The cubic root of 68505820 is about 409.1750615060.

The spelling of 68505820 in words is "sixty-eight million, five hundred five thousand, eight hundred twenty".