68311040 has 96 divisors (see below), whose sum is σ = 187518240. Its totient is φ = 23396352.

The previous prime is 68311021. The next prime is 68311057. The reversal of 68311040 is 4011386.

It is a junction number, because it is equal to n+sod(n) for n = 68310997 and 68311015.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71204 + ... + 72156.

It is an arithmetic number, because the mean of its divisors is an integer number (1953315).

Almost surely, 2^68311040 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 68311040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93759120).

68311040 is an abundant number, since it is smaller than the sum of its proper divisors (119207200).

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

68311040 is an equidigital number, since it uses as much as digits as its factorization.

68311040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 68311040 is about 8265.0493041482. The cubic root of 68311040 is about 408.7868960762.

The spelling of 68311040 in words is "sixty-eight million, three hundred eleven thousand, forty".