381128842 has 4 divisors (see below), whose sum is σ = 571693266. Its totient is φ = 190564420.

The previous prime is 381128827. The next prime is 381128863. The reversal of 381128842 is 248821183.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 355737321 + 25391521 = 18861^2 + 5039^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95282209 + ... + 95282212.

Almost surely, 2^381128842 is an apocalyptic number.

381128842 is a deficient number, since it is larger than the sum of its proper divisors (190564424).

381128842 is a wasteful number, since it uses less digits than its factorization.

381128842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190564423.

The product of its digits is 24576, while the sum is 37.

The square root of 381128842 is about 19522.5214047776. The cubic root of 381128842 is about 725.0321615538.

The spelling of 381128842 in words is "three hundred eighty-one million, one hundred twenty-eight thousand, eight hundred forty-two".