68311408 has 20 divisors (see below), whose sum is σ = 144385848. Its totient is φ = 31050560.

The previous prime is 68311349. The next prime is 68311417. The reversal of 68311408 is 80411386.

It is a self number, because there is not a number n which added to its sum of digits gives 68311408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193891 + ... + 194242.

Almost surely, 2^68311408 is an apocalyptic number.

It is an amenable number.

68311408 is an abundant number, since it is smaller than the sum of its proper divisors (76074440).

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

68311408 is a wasteful number, since it uses less digits than its factorization.

68311408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388152 (or 388146 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 68311408 is about 8265.0715665383. The cubic root of 68311408 is about 408.7876301367.

The spelling of 68311408 in words is "sixty-eight million, three hundred eleven thousand, four hundred eight".