68157908 has 48 divisors (see below), whose sum is σ = 150415104. Its totient is φ = 26300160.

The previous prime is 68157907. The next prime is 68157919. The reversal of 68157908 is 80975186.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68157907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12641 + ... + 17207.

It is an arithmetic number, because the mean of its divisors is an integer number (3133648).

Almost surely, 2^68157908 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 68157908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75207552).

68157908 is an abundant number, since it is smaller than the sum of its proper divisors (82257196).

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

68157908 is a wasteful number, since it uses less digits than its factorization.

68157908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4632 (or 4630 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 44.

The square root of 68157908 is about 8255.7802780840. The cubic root of 68157908 is about 408.4812100620.

The spelling of 68157908 in words is "sixty-eight million, one hundred fifty-seven thousand, nine hundred eight".