68781648 has 120 divisors (see below), whose sum is σ = 196966560. Its totient is φ = 20666880.

The previous prime is 68781623. The next prime is 68781673. The reversal of 68781648 is 84618786.

It is an interprime number because it is at equal distance from previous prime (68781623) and next prime (68781673).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 68781597 and 68781606.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 494763 + ... + 494901.

It is an arithmetic number, because the mean of its divisors is an integer number (1641388).

Almost surely, 2^68781648 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 68781648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98483280).

68781648 is an abundant number, since it is smaller than the sum of its proper divisors (128184912).

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

68781648 is a wasteful number, since it uses less digits than its factorization.

68781648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 218 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 68781648 is about 8293.4702025147. The cubic root of 68781648 is about 409.7234859713.

The spelling of 68781648 in words is "sixty-eight million, seven hundred eighty-one thousand, six hundred forty-eight".