68168440 has 16 divisors (see below), whose sum is σ = 153379080. Its totient is φ = 27267360.

The previous prime is 68168437. The next prime is 68168461. The reversal of 68168440 is 4486186.

It is a self number, because there is not a number n which added to its sum of digits gives 68168440.

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, 852066 + ... + 852145.

Almost surely, 2^68168440 is an apocalyptic number.

It is an amenable number.

68168440 is an abundant number, since it is smaller than the sum of its proper divisors (85210640).

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

68168440 is a wasteful number, since it uses less digits than its factorization.

68168440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1704222 (or 1704218 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 68168440 is about 8256.4181095679. The cubic root of 68168440 is about 408.5022489635.

The spelling of 68168440 in words is "sixty-eight million, one hundred sixty-eight thousand, four hundred forty".