381214784 has 56 divisors (see below), whose sum is σ = 800100000. Its totient is φ = 179712000.

The previous prime is 381214777. The next prime is 381214787. The reversal of 381214784 is 487412183.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (381214787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304592 + ... + 305840.

It is an arithmetic number, because the mean of its divisors is an integer number (14287500).

Almost surely, 2^381214784 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 381214784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (400050000).

381214784 is an abundant number, since it is smaller than the sum of its proper divisors (418885216).

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

381214784 is a wasteful number, since it uses less digits than its factorization.

381214784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1521 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 381214784 is about 19524.7223795884. The cubic root of 381214784 is about 725.0866540895.

The spelling of 381214784 in words is "three hundred eighty-one million, two hundred fourteen thousand, seven hundred eighty-four".