68019740 has 48 divisors (see below), whose sum is σ = 151345152. Its totient is φ = 25624896.

The previous prime is 68019739. The next prime is 68019767. The reversal of 68019740 is 4791086.

It is a self number, because there is not a number n which added to its sum of digits gives 68019740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29717 + ... + 31923.

It is an arithmetic number, because the mean of its divisors is an integer number (3153024).

Almost surely, 2^68019740 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 68019740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75672576).

68019740 is an abundant number, since it is smaller than the sum of its proper divisors (83325412).

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

68019740 is a wasteful number, since it uses less digits than its factorization.

68019740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306 (or 2304 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 68019740 is about 8247.4080776933. The cubic root of 68019740 is about 408.2050023861.

The spelling of 68019740 in words is "sixty-eight million, nineteen thousand, seven hundred forty".