68805972 has 54 divisors (see below), whose sum is σ = 181867322. Its totient is φ = 21932064.

The previous prime is 68805943. The next prime is 68805991. The reversal of 68805972 is 27950886.

It can be written as a sum of positive squares in only one way, i.e., 35212356 + 33593616 = 5934^2 + 5796^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17238 + ... + 20850.

Almost surely, 2^68805972 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 68805972, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90933661).

68805972 is an abundant number, since it is smaller than the sum of its proper divisors (113061350).

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

68805972 is a wasteful number, since it uses less digits than its factorization.

68805972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3669 (or 3641 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 68805972 is about 8294.9365277861. The cubic root of 68805972 is about 409.7717785987.

The spelling of 68805972 in words is "sixty-eight million, eight hundred five thousand, nine hundred seventy-two".