68117440 has 28 divisors (see below), whose sum is σ = 162205416. Its totient is φ = 27246848.

The previous prime is 68117437. The next prime is 68117551. The reversal of 68117440 is 4471186.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106114 + ... + 106753.

Almost surely, 2^68117440 is an apocalyptic number.

It is an amenable number.

68117440 is an abundant number, since it is smaller than the sum of its proper divisors (94087976).

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

68117440 is a wasteful number, since it uses less digits than its factorization.

68117440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212884 (or 212874 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 68117440 is about 8253.3290253085. The cubic root of 68117440 is about 408.4003503313.

The spelling of 68117440 in words is "sixty-eight million, one hundred seventeen thousand, four hundred forty".