68781504 has 112 divisors (see below), whose sum is σ = 205557120. Its totient is φ = 20106240.

The previous prime is 68781499. The next prime is 68781527. The reversal of 68781504 is 40518786.

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, 60687 + ... + 61809.

Almost surely, 2^68781504 is an apocalyptic number.

68781504 is a gapful number since it is divisible by the number (64) 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 68781504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102778560).

68781504 is an abundant number, since it is smaller than the sum of its proper divisors (136775616).

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

68781504 is a wasteful number, since it uses less digits than its factorization.

68781504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1178 (or 1168 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 39.

The square root of 68781504 is about 8293.4615209815. The cubic root of 68781504 is about 409.7232000412.

The spelling of 68781504 in words is "sixty-eight million, seven hundred eighty-one thousand, five hundred four".