68005504 has 64 divisors (see below), whose sum is σ = 157161600. Its totient is φ = 28707840.

The previous prime is 68005481. The next prime is 68005507. The reversal of 68005504 is 40550086.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (68005507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63082 + ... + 64150.

It is an arithmetic number, because the mean of its divisors is an integer number (2455650).

Almost surely, 2^68005504 is an apocalyptic number.

68005504 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 68005504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78580800).

68005504 is an abundant number, since it is smaller than the sum of its proper divisors (89156096).

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

68005504 is a wasteful number, since it uses less digits than its factorization.

68005504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 68005504 is about 8246.5449735025. The cubic root of 68005504 is about 408.1765223602.

The spelling of 68005504 in words is "sixty-eight million, five thousand, five hundred four".