68451336 has 48 divisors (see below), whose sum is σ = 187244460. Its totient is φ = 22588800.

The previous prime is 68451329. The next prime is 68451337. The reversal of 68451336 is 63315486.

It can be written as a sum of positive squares in 2 ways, for example, as 42380100 + 26071236 = 6510^2 + 5106^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 68451336.

It is not an unprimeable number, because it can be changed into a prime (68451337) 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, 2566 + ... + 11978.

Almost surely, 2^68451336 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 68451336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93622230).

68451336 is an abundant number, since it is smaller than the sum of its proper divisors (118793124).

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

68451336 is a wasteful number, since it uses less digits than its factorization.

68451336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9526 (or 9519 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 68451336 is about 8273.5322565395. The cubic root of 68451336 is about 409.0665577963.

The spelling of 68451336 in words is "sixty-eight million, four hundred fifty-one thousand, three hundred thirty-six".