381366228 has 24 divisors (see below), whose sum is σ = 891112320. Its totient is φ = 126942400.

The previous prime is 381366221. The next prime is 381366229. The reversal of 381366228 is 822663183.

381366228 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

381366228 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381366221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13473 + ... + 30728.

It is an arithmetic number, because the mean of its divisors is an integer number (37129680).

Almost surely, 2^381366228 is an apocalyptic number.

It is an amenable number.

381366228 is an abundant number, since it is smaller than the sum of its proper divisors (509746092).

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

381366228 is a wasteful number, since it uses less digits than its factorization.

381366228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44927 (or 44925 counting only the distinct ones).

The product of its digits is 82944, while the sum is 39.

The square root of 381366228 is about 19528.6002570589. The cubic root of 381366228 is about 725.1826590101.

The spelling of 381366228 in words is "three hundred eighty-one million, three hundred sixty-six thousand, two hundred twenty-eight".