68040032 has 48 divisors (see below), whose sum is σ = 139754160. Its totient is φ = 32567808.

The previous prime is 68040031. The next prime is 68040043. The reversal of 68040032 is 23004086.

It is a happy number.

It is a super-2 number, since 2×68040032² = 9258891909122048, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68040031) 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, 145463 + ... + 145929.

It is an arithmetic number, because the mean of its divisors is an integer number (2911545).

Almost surely, 2^68040032 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 68040032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69877080).

68040032 is an abundant number, since it is smaller than the sum of its proper divisors (71714128).

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

68040032 is a wasteful number, since it uses less digits than its factorization.

68040032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 663 (or 655 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 68040032 is about 8248.6381906349. The cubic root of 68040032 is about 408.2455909581.

The spelling of 68040032 in words is "sixty-eight million, forty thousand, thirty-two".