68913520 has 160 divisors (see below), whose sum is σ = 186988032. Its totient is φ = 23417856.

The previous prime is 68913511. The next prime is 68913521. The reversal of 68913520 is 2531986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68913521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1028527 + ... + 1028593.

Almost surely, 2^68913520 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 68913520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93494016).

68913520 is an abundant number, since it is smaller than the sum of its proper divisors (118074512).

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

68913520 is a wasteful number, since it uses less digits than its factorization.

68913520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 68913520 is about 8301.4167465560. The cubic root of 68913520 is about 409.9851670224.

The spelling of 68913520 in words is "sixty-eight million, nine hundred thirteen thousand, five hundred twenty".