68261620 has 48 divisors (see below), whose sum is σ = 165070080. Its totient is φ = 23226624.

The previous prime is 68261617. The next prime is 68261663. The reversal of 68261620 is 2616286.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17401 + ... + 20959.

It is an arithmetic number, because the mean of its divisors is an integer number (3438960).

Almost surely, 2^68261620 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 68261620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82535040).

68261620 is an abundant number, since it is smaller than the sum of its proper divisors (96808460).

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

68261620 is a wasteful number, since it uses less digits than its factorization.

68261620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3712 (or 3710 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 68261620 is about 8262.0590653904. The cubic root of 68261620 is about 408.6882925798.

The spelling of 68261620 in words is "sixty-eight million, two hundred sixty-one thousand, six hundred twenty".