381201866 has 16 divisors (see below), whose sum is σ = 584772480. Its totient is φ = 186288960.

The previous prime is 381201851. The next prime is 381201889. The reversal of 381201866 is 668102183.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78386 + ... + 83106.

It is an arithmetic number, because the mean of its divisors is an integer number (36548280).

Almost surely, 2^381201866 is an apocalyptic number.

381201866 is a deficient number, since it is larger than the sum of its proper divisors (203570614).

381201866 is a wasteful number, since it uses less digits than its factorization.

381201866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5629.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 381201866 is about 19524.3915654240. The cubic root of 381201866 is about 725.0784638028.

The spelling of 381201866 in words is "three hundred eighty-one million, two hundred one thousand, eight hundred sixty-six".