381537228 has 24 divisors (see below), whose sum is σ = 892095232. Its totient is φ = 126915984.

The previous prime is 381537217. The next prime is 381537241. The reversal of 381537228 is 822735183.

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, 26800 + ... + 38487.

Almost surely, 2^381537228 is an apocalyptic number.

It is an amenable number.

381537228 is an abundant number, since it is smaller than the sum of its proper divisors (510558004).

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

381537228 is a wasteful number, since it uses less digits than its factorization.

381537228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65781 (or 65779 counting only the distinct ones).

The product of its digits is 80640, while the sum is 39.

The square root of 381537228 is about 19532.9779603623. The cubic root of 381537228 is about 725.2910305227.

The spelling of 381537228 in words is "three hundred eighty-one million, five hundred thirty-seven thousand, two hundred twenty-eight".