68071040 has 128 divisors (see below), whose sum is σ = 173905920. Its totient is φ = 25436160.

The previous prime is 68071019. The next prime is 68071049. The reversal of 68071040 is 4017086.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68071049) 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, 932444 + ... + 932516.

It is an arithmetic number, because the mean of its divisors is an integer number (1358640).

Almost surely, 2^68071040 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 68071040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86952960).

68071040 is an abundant number, since it is smaller than the sum of its proper divisors (105834880).

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

68071040 is a wasteful number, since it uses less digits than its factorization.

68071040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170 (or 158 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 68071040 is about 8250.5175595232. The cubic root of 68071040 is about 408.3075983596.

The spelling of 68071040 in words is "sixty-eight million, seventy-one thousand, forty".