68863720 has 16 divisors (see below), whose sum is σ = 154943460. Its totient is φ = 27545472.

The previous prime is 68863673. The next prime is 68863721. The reversal of 68863720 is 2736886.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67930564 + 933156 = 8242^2 + 966^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 1721593 = 68863720 / (6 + 8 + 8 + 6 + 3 + 7 + 2 + 0).

It is not an unprimeable number, because it can be changed into a prime (68863721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 860757 + ... + 860836.

Almost surely, 2^68863720 is an apocalyptic number.

It is an amenable number.

68863720 is an abundant number, since it is smaller than the sum of its proper divisors (86079740).

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

68863720 is a wasteful number, since it uses less digits than its factorization.

68863720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721604 (or 1721600 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 68863720 is about 8298.4167164586. The cubic root of 68863720 is about 409.8863853347.

The spelling of 68863720 in words is "sixty-eight million, eight hundred sixty-three thousand, seven hundred twenty".