381889790 has 8 divisors (see below), whose sum is σ = 687401640. Its totient is φ = 152755912.

The previous prime is 381889771. The next prime is 381889799. The reversal of 381889790 is 97988183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381889799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19094480 + ... + 19094499.

It is an arithmetic number, because the mean of its divisors is an integer number (85925205).

Almost surely, 2^381889790 is an apocalyptic number.

381889790 is a deficient number, since it is larger than the sum of its proper divisors (305511850).

381889790 is a wasteful number, since it uses less digits than its factorization.

381889790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38188986.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 381889790 is about 19542.0006652338. Note that the first 3 decimals coincide. The cubic root of 381889790 is about 725.5143650708.

The spelling of 381889790 in words is "three hundred eighty-one million, eight hundred eighty-nine thousand, seven hundred ninety".