381278252 has 12 divisors (see below), whose sum is σ = 668633280. Its totient is φ = 190240176.

The previous prime is 381278239. The next prime is 381278267. The reversal of 381278252 is 252872183.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97583 + ... + 101414.

It is an arithmetic number, because the mean of its divisors is an integer number (55719440).

Almost surely, 2^381278252 is an apocalyptic number.

It is an amenable number.

381278252 is a deficient number, since it is larger than the sum of its proper divisors (287355028).

381278252 is a wasteful number, since it uses less digits than its factorization.

381278252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199480 (or 199478 counting only the distinct ones).

The product of its digits is 53760, while the sum is 38.

The square root of 381278252 is about 19526.3476359508. The cubic root of 381278252 is about 725.1268914640.

The spelling of 381278252 in words is "three hundred eighty-one million, two hundred seventy-eight thousand, two hundred fifty-two".