68537320 has 32 divisors (see below), whose sum is σ = 158380200. Its totient is φ = 26673408.

The previous prime is 68537299. The next prime is 68537323. The reversal of 68537320 is 2373586.

It can be written as a sum of positive squares in 4 ways, for example, as 68260644 + 276676 = 8262^2 + 526^2 .

It is not an unprimeable number, because it can be changed into a prime (68537323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21675 + ... + 24634.

Almost surely, 2^68537320 is an apocalyptic number.

It is an amenable number.

68537320 is an abundant number, since it is smaller than the sum of its proper divisors (89842880).

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

68537320 is a wasteful number, since it uses less digits than its factorization.

68537320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46357 (or 46353 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 68537320 is about 8278.7269552752. The cubic root of 68537320 is about 409.2377668324.

The spelling of 68537320 in words is "sixty-eight million, five hundred thirty-seven thousand, three hundred twenty".