68443536 has 80 divisors (see below), whose sum is σ = 208621568. Its totient is φ = 18921600.

The previous prime is 68443493. The next prime is 68443541. The reversal of 68443536 is 63534486.

It is a junction number, because it is equal to n+sod(n) for n = 68443494 and 68443503.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7131 + ... + 13701.

Almost surely, 2^68443536 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 68443536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104310784).

68443536 is an abundant number, since it is smaller than the sum of its proper divisors (140178032).

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

68443536 is a wasteful number, since it uses less digits than its factorization.

68443536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6620 (or 6614 counting only the distinct ones).

The product of its digits is 207360, while the sum is 39.

The square root of 68443536 is about 8273.0608604071. The cubic root of 68443536 is about 409.0510195539.

The spelling of 68443536 in words is "sixty-eight million, four hundred forty-three thousand, five hundred thirty-six".