68309816 has 16 divisors (see below), whose sum is σ = 133650000. Its totient is φ = 32669824.

The previous prime is 68309809. The next prime is 68309821. The reversal of 68309816 is 61890386.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185441 + ... + 185808.

It is an arithmetic number, because the mean of its divisors is an integer number (8353125).

Almost surely, 2^68309816 is an apocalyptic number.

It is an amenable number.

68309816 is a deficient number, since it is larger than the sum of its proper divisors (65340184).

68309816 is a wasteful number, since it uses less digits than its factorization.

68309816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371278 (or 371274 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 68309816 is about 8264.9752570713. The cubic root of 68309816 is about 408.7844545082.

The spelling of 68309816 in words is "sixty-eight million, three hundred nine thousand, eight hundred sixteen".