381428942 has 16 divisors (see below), whose sum is σ = 580778640. Its totient is φ = 187843392.

The previous prime is 381428921. The next prime is 381428951. The reversal of 381428942 is 249824183.

It is a self number, because there is not a number n which added to its sum of digits gives 381428942.

It is a congruent number.

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, 146609 + ... + 149187.

It is an arithmetic number, because the mean of its divisors is an integer number (36298665).

Almost surely, 2^381428942 is an apocalyptic number.

381428942 is a deficient number, since it is larger than the sum of its proper divisors (199349698).

381428942 is a wasteful number, since it uses less digits than its factorization.

381428942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3667.

The product of its digits is 110592, while the sum is 41.

The square root of 381428942 is about 19530.2058872916. The cubic root of 381428942 is about 725.2224078650. Note that the first 3 decimals are identical.

The spelling of 381428942 in words is "three hundred eighty-one million, four hundred twenty-eight thousand, nine hundred forty-two".