68817870 has 256 divisors, whose sum is σ = 223948800. Its totient is φ = 14837760.

The previous prime is 68817869. The next prime is 68817883. The reversal of 68817870 is 7871886.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1464187 + ... + 1464233.

It is an arithmetic number, because the mean of its divisors is an integer number (874800).

Almost surely, 2^68817870 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68817870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111974400).

68817870 is an abundant number, since it is smaller than the sum of its proper divisors (155130930).

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

68817870 is a wasteful number, since it uses less digits than its factorization.

68817870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 68817870 is about 8295.6536812960. The cubic root of 68817870 is about 409.7953966243.

The spelling of 68817870 in words is "sixty-eight million, eight hundred seventeen thousand, eight hundred seventy".