381137228 has 12 divisors (see below), whose sum is σ = 667127832. Its totient is φ = 190529280.

The previous prime is 381137221. The next prime is 381137243. The reversal of 381137228 is 822731183.

It is not an unprimeable number, because it can be changed into a prime (381137221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29051 + ... + 40077.

It is an arithmetic number, because the mean of its divisors is an integer number (55593986).

Almost surely, 2^381137228 is an apocalyptic number.

It is an amenable number.

381137228 is a deficient number, since it is larger than the sum of its proper divisors (285990604).

381137228 is a wasteful number, since it uses less digits than its factorization.

381137228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19672 (or 19670 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 381137228 is about 19522.7361811812. The cubic root of 381137228 is about 725.0374791564.

The spelling of 381137228 in words is "three hundred eighty-one million, one hundred thirty-seven thousand, two hundred twenty-eight".