68285778 has 32 divisors (see below), whose sum is σ = 154128960. Its totient is φ = 19978560.

The previous prime is 68285773. The next prime is 68285801. The reversal of 68285778 is 87758286.

It is a self number, because there is not a number n which added to its sum of digits gives 68285778.

It is not an unprimeable number, because it can be changed into a prime (68285773) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15925 + ... + 19752.

It is an arithmetic number, because the mean of its divisors is an integer number (4816530).

Almost surely, 2^68285778 is an apocalyptic number.

68285778 is an abundant number, since it is smaller than the sum of its proper divisors (85843182).

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

68285778 is a wasteful number, since it uses less digits than its factorization.

68285778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35722.

The product of its digits is 1505280, while the sum is 51.

The square root of 68285778 is about 8263.5209202857. The cubic root of 68285778 is about 408.7364989134.

The spelling of 68285778 in words is "sixty-eight million, two hundred eighty-five thousand, seven hundred seventy-eight".