68509790 has 16 divisors (see below), whose sum is σ = 123966720. Its totient is φ = 27259680.

The previous prime is 68509787. The next prime is 68509823. The reversal of 68509790 is 9790586.

It is a congruent number.

It is an unprimeable number.

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, 16025 + ... + 19844.

It is an arithmetic number, because the mean of its divisors is an integer number (7747920).

Almost surely, 2^68509790 is an apocalyptic number.

68509790 is a deficient number, since it is larger than the sum of its proper divisors (55456930).

68509790 is a wasteful number, since it uses less digits than its factorization.

68509790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36067.

The product of its (nonzero) digits is 136080, while the sum is 44.

The square root of 68509790 is about 8277.0640930224. The cubic root of 68509790 is about 409.1829654262.

The spelling of 68509790 in words is "sixty-eight million, five hundred nine thousand, seven hundred ninety".