68787018 has 24 divisors (see below), whose sum is σ = 149226948. Its totient is φ = 22900032.

The previous prime is 68787007. The next prime is 68787031. The reversal of 68787018 is 81078786.

It can be written as a sum of positive squares in 2 ways, for example, as 68608089 + 178929 = 8283^2 + 423^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16030 + ... + 19862.

Almost surely, 2^68787018 is an apocalyptic number.

68787018 is an abundant number, since it is smaller than the sum of its proper divisors (80439930).

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

68787018 is a wasteful number, since it uses less digits than its factorization.

68787018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4838 (or 4835 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 45.

The square root of 68787018 is about 8293.7939448723. The cubic root of 68787018 is about 409.7341484950.

The spelling of 68787018 in words is "sixty-eight million, seven hundred eighty-seven thousand, eighteen".