68809450 has 24 divisors (see below), whose sum is σ = 134723520. Its totient is φ = 26074800.

The previous prime is 68809441. The next prime is 68809451. The reversal of 68809450 is 5490886.

It is not an unprimeable number, because it can be changed into a prime (68809451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35266 + ... + 37165.

It is an arithmetic number, because the mean of its divisors is an integer number (5613480).

Almost surely, 2^68809450 is an apocalyptic number.

68809450 is a deficient number, since it is larger than the sum of its proper divisors (65914070).

68809450 is a wasteful number, since it uses less digits than its factorization.

68809450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72462 (or 72457 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 68809450 is about 8295.1461711051. The cubic root of 68809450 is about 409.7786828552.

The spelling of 68809450 in words is "sixty-eight million, eight hundred nine thousand, four hundred fifty".