68720236 has 24 divisors (see below), whose sum is σ = 129999744. Its totient is φ = 31597440.

The previous prime is 68720233. The next prime is 68720237. The reversal of 68720236 is 63202786.

It is not an unprimeable number, because it can be changed into a prime (68720233) 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 7 ways as a sum of consecutive naturals, for example, 12261 + ... + 16963.

It is an arithmetic number, because the mean of its divisors is an integer number (5416656).

Almost surely, 2^68720236 is an apocalyptic number.

It is an amenable number.

68720236 is a deficient number, since it is larger than the sum of its proper divisors (61279508).

68720236 is a wasteful number, since it uses less digits than its factorization.

68720236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5001 (or 4999 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 34.

The square root of 68720236 is about 8289.7669448544. The cubic root of 68720236 is about 409.6015085165.

The spelling of 68720236 in words is "sixty-eight million, seven hundred twenty thousand, two hundred thirty-six".