68007784 has 32 divisors (see below), whose sum is σ = 142065000. Its totient is φ = 30304512.

The previous prime is 68007781. The next prime is 68007787. The reversal of 68007784 is 48770086.

It is an interprime number because it is at equal distance from previous prime (68007781) and next prime (68007787).

It can be written as a sum of positive squares in 4 ways, for example, as 64480900 + 3526884 = 8030^2 + 1878^2 .

It is not an unprimeable number, because it can be changed into a prime (68007781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8259 + ... + 14290.

Almost surely, 2^68007784 is an apocalyptic number.

It is an amenable number.

68007784 is an abundant number, since it is smaller than the sum of its proper divisors (74057216).

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

68007784 is a wasteful number, since it uses less digits than its factorization.

68007784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22597 (or 22593 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 68007784 is about 8246.6832120556. The cubic root of 68007784 is about 408.1810839129.

The spelling of 68007784 in words is "sixty-eight million, seven thousand, seven hundred eighty-four".