68021000 has 64 divisors (see below), whose sum is σ = 160392960. Its totient is φ = 27000000.

The previous prime is 68020999. The next prime is 68021047. The reversal of 68021000 is 12086.

68021000 = T₂₄₉ + T₂₅₀ + ... + T₇₅₀.

It is a self number, because there is not a number n which added to its sum of digits gives 68021000.

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 15 ways as a sum of consecutive naturals, for example, 250865 + ... + 251135.

It is an arithmetic number, because the mean of its divisors is an integer number (2506140).

Almost surely, 2^68021000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68021000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80196480).

68021000 is an abundant number, since it is smaller than the sum of its proper divisors (92371960).

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

68021000 is a wasteful number, since it uses less digits than its factorization.

68021000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 68021000 is about 8247.4844649748. The cubic root of 68021000 is about 408.2075229050.

Adding to 68021000 its reverse (12086), we get a palindrome (68033086).

The spelling of 68021000 in words is "sixty-eight million, twenty-one thousand".