68629578 has 32 divisors (see below), whose sum is σ = 145696320. Its totient is φ = 21477120.

The previous prime is 68629571. The next prime is 68629579. The reversal of 68629578 is 87592686.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 68629578.

It is not an unprimeable number, because it can be changed into a prime (68629571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66708 + ... + 67728.

It is an arithmetic number, because the mean of its divisors is an integer number (4553010).

Almost surely, 2^68629578 is an apocalyptic number.

68629578 is an abundant number, since it is smaller than the sum of its proper divisors (77066742).

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

68629578 is a wasteful number, since it uses less digits than its factorization.

68629578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702.

The product of its digits is 1451520, while the sum is 51.

The square root of 68629578 is about 8284.2970733792. The cubic root of 68629578 is about 409.4213093155.

The spelling of 68629578 in words is "sixty-eight million, six hundred twenty-nine thousand, five hundred seventy-eight".