381218384 has 40 divisors (see below), whose sum is σ = 748344960. Its totient is φ = 188115200.

The previous prime is 381218359. The next prime is 381218393. The reversal of 381218384 is 483812183.

It is a congruent number.

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, 500564 + ... + 501324.

It is an arithmetic number, because the mean of its divisors is an integer number (18708624).

Almost surely, 2^381218384 is an apocalyptic number.

It is an amenable number.

381218384 is a deficient number, since it is larger than the sum of its proper divisors (367126576).

381218384 is a wasteful number, since it uses less digits than its factorization.

381218384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1133 counting only the distinct ones).

The product of its digits is 36864, while the sum is 38.

The square root of 381218384 is about 19524.8145701822. The cubic root of 381218384 is about 725.0889365331.

The spelling of 381218384 in words is "three hundred eighty-one million, two hundred eighteen thousand, three hundred eighty-four".