68510820 has 96 divisors (see below), whose sum is σ = 223776000. Its totient is φ = 15654912.

The previous prime is 68510777. The next prime is 68510831. The reversal of 68510820 is 2801586.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 18916 + ... + 22244.

It is an arithmetic number, because the mean of its divisors is an integer number (2331000).

Almost surely, 2^68510820 is an apocalyptic number.

68510820 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68510820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111888000).

68510820 is an abundant number, since it is smaller than the sum of its proper divisors (155265180).

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

68510820 is a wasteful number, since it uses less digits than its factorization.

68510820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3362 (or 3346 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 68510820 is about 8277.1263129180. The cubic root of 68510820 is about 409.1850160156.

The spelling of 68510820 in words is "sixty-eight million, five hundred ten thousand, eight hundred twenty".