68812420 has 12 divisors (see below), whose sum is σ = 144506124. Its totient is φ = 27524960.

The previous prime is 68812369. The next prime is 68812421. The reversal of 68812420 is 2421886.

It can be written as a sum of positive squares in 2 ways, for example, as 38142976 + 30669444 = 6176^2 + 5538^2 .

It is not an unprimeable number, because it can be changed into a prime (68812421) 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 3 ways as a sum of consecutive naturals, for example, 1720291 + ... + 1720330.

It is an arithmetic number, because the mean of its divisors is an integer number (12042177).

Almost surely, 2^68812420 is an apocalyptic number.

It is an amenable number.

68812420 is an abundant number, since it is smaller than the sum of its proper divisors (75693704).

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

68812420 is a wasteful number, since it uses less digits than its factorization.

68812420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440630 (or 3440628 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 68812420 is about 8295.3251895269. The cubic root of 68812420 is about 409.7845784852.

The spelling of 68812420 in words is "sixty-eight million, eight hundred twelve thousand, four hundred twenty".