68641872 has 80 divisors (see below), whose sum is σ = 195695808. Its totient is φ = 20597760.

The previous prime is 68641871. The next prime is 68641879. The reversal of 68641872 is 27814686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68641871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24243 + ... + 26925.

Almost surely, 2^68641872 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 68641872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (97847904).

68641872 is an abundant number, since it is smaller than the sum of its proper divisors (127053936).

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

68641872 is a wasteful number, since it uses less digits than its factorization.

68641872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748 (or 2742 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 68641872 is about 8285.0390463775. The cubic root of 68641872 is about 409.4457551652.

The spelling of 68641872 in words is "sixty-eight million, six hundred forty-one thousand, eight hundred seventy-two".