368640018 has 64 divisors (see below), whose sum is σ = 834986880. Its totient is φ = 120536064.

The previous prime is 368640017. The next prime is 368640031. The reversal of 368640018 is 810046863.

It is a happy number.

368640018 is a `hidden beast` number, since 3 + 6 + 8 + 640 + 0 + 1 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (368640017) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1044130 + ... + 1044482.

It is an arithmetic number, because the mean of its divisors is an integer number (13046670).

Almost surely, 2^368640018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 368640018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (417493440).

368640018 is an abundant number, since it is smaller than the sum of its proper divisors (466346862).

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

368640018 is a wasteful number, since it uses less digits than its factorization.

368640018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680 (or 674 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 368640018 is about 19200.0004687500. Note that the first 3 decimals coincide. The cubic root of 368640018 is about 717.0247711195.

The spelling of 368640018 in words is "three hundred sixty-eight million, six hundred forty thousand, eighteen".