68311788 has 12 divisors (see below), whose sum is σ = 159394200. Its totient is φ = 22770592.

The previous prime is 68311787. The next prime is 68311819. The reversal of 68311788 is 88711386.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (68311787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2846313 + ... + 2846336.

It is an arithmetic number, because the mean of its divisors is an integer number (13282850).

Almost surely, 2^68311788 is an apocalyptic number.

It is an amenable number.

68311788 is an abundant number, since it is smaller than the sum of its proper divisors (91082412).

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

68311788 is a wasteful number, since it uses less digits than its factorization.

68311788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5692656 (or 5692654 counting only the distinct ones).

The product of its digits is 64512, while the sum is 42.

The square root of 68311788 is about 8265.0945548130. The cubic root of 68311788 is about 408.7883881312.

The spelling of 68311788 in words is "sixty-eight million, three hundred eleven thousand, seven hundred eighty-eight".