68443530 has 64 divisors (see below), whose sum is σ = 178028928. Its totient is φ = 16773120.

The previous prime is 68443493. The next prime is 68443541. The reversal of 68443530 is 3534486.

It is a junction number, because it is equal to n+sod(n) for n = 68443491 and 68443500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20370 + ... + 23490.

It is an arithmetic number, because the mean of its divisors is an integer number (2781702).

Almost surely, 2^68443530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68443530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89014464).

68443530 is an abundant number, since it is smaller than the sum of its proper divisors (109585398).

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

68443530 is a wasteful number, since it uses less digits than its factorization.

68443530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3191.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 68443530 is about 8273.0604977844. The cubic root of 68443530 is about 409.0510076010.

The spelling of 68443530 in words is "sixty-eight million, four hundred forty-three thousand, five hundred thirty".