68443506 has 12 divisors (see below), whose sum is σ = 148294302. Its totient is φ = 22814496.

The previous prime is 68443493. The next prime is 68443541. The reversal of 68443506 is 60534486.

It can be written as a sum of positive squares in only one way, i.e., 67322025 + 1121481 = 8205^2 + 1059^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1901191 + ... + 1901226.

Almost surely, 2^68443506 is an apocalyptic number.

68443506 is an abundant number, since it is smaller than the sum of its proper divisors (79850796).

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

68443506 is a wasteful number, since it uses less digits than its factorization.

68443506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3802425 (or 3802422 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 68443506 is about 8273.0590472932. The cubic root of 68443506 is about 409.0509597892.

The spelling of 68443506 in words is "sixty-eight million, four hundred forty-three thousand, five hundred six".