68157870 has 64 divisors (see below), whose sum is σ = 181025280. Its totient is φ = 16284800.

The previous prime is 68157851. The next prime is 68157899. The reversal of 68157870 is 7875186.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21976 + ... + 24884.

It is an arithmetic number, because the mean of its divisors is an integer number (2828520).

Almost surely, 2^68157870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68157870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90512640).

68157870 is an abundant number, since it is smaller than the sum of its proper divisors (112867410).

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

68157870 is a wasteful number, since it uses less digits than its factorization.

68157870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3001.

The product of its (nonzero) digits is 94080, while the sum is 42.

The square root of 68157870 is about 8255.7779766658. Note that the first 3 decimals coincide. The cubic root of 68157870 is about 408.4811341487.

The spelling of 68157870 in words is "sixty-eight million, one hundred fifty-seven thousand, eight hundred seventy".