68002840 has 64 divisors (see below), whose sum is σ = 159356160. Its totient is φ = 26088960.

The previous prime is 68002829. The next prime is 68002841. The reversal of 68002840 is 4820086.

It is a junction number, because it is equal to n+sod(n) for n = 68002799 and 68002808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68002841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214362 + ... + 214678.

It is an arithmetic number, because the mean of its divisors is an integer number (2489940).

Almost surely, 2^68002840 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 68002840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79678080).

68002840 is an abundant number, since it is smaller than the sum of its proper divisors (91353320).

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

68002840 is a wasteful number, since it uses less digits than its factorization.

68002840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 68002840 is about 8246.3834497312. The cubic root of 68002840 is about 408.1711924168.

The spelling of 68002840 in words is "sixty-eight million, two thousand, eight hundred forty".