381022000 has 80 divisors (see below), whose sum is σ = 937216800. Its totient is φ = 149779200.

The previous prime is 381021989. The next prime is 381022001. The reversal of 381022000 is 220183.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (381022001) 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 15 ways as a sum of consecutive naturals, for example, 116386 + ... + 119614.

It is an arithmetic number, because the mean of its divisors is an integer number (11715210).

Almost surely, 2^381022000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 381022000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (468608400).

381022000 is an abundant number, since it is smaller than the sum of its proper divisors (556194800).

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

381022000 is a wasteful number, since it uses less digits than its factorization.

381022000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3311 (or 3295 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 381022000 is about 19519.7848348797. The cubic root of 381022000 is about 724.9644057040.

Adding to 381022000 its reverse (220183), we get a palindrome (381242183).

The spelling of 381022000 in words is "three hundred eighty-one million, twenty-two thousand".