68415872 has 64 divisors (see below), whose sum is σ = 161200800. Its totient is φ = 28299264.

The previous prime is 68415863. The next prime is 68415877. The reversal of 68415872 is 27851486.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68415877) 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, 24668 + ... + 27300.

Almost surely, 2^68415872 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 68415872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80600400).

68415872 is an abundant number, since it is smaller than the sum of its proper divisors (92784928).

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

68415872 is a wasteful number, since it uses less digits than its factorization.

68415872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2683 (or 2671 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 68415872 is about 8271.3887588482. The cubic root of 68415872 is about 408.9959010674.

The spelling of 68415872 in words is "sixty-eight million, four hundred fifteen thousand, eight hundred seventy-two".