381828380 has 12 divisors (see below), whose sum is σ = 801839640. Its totient is φ = 152731344.

The previous prime is 381828361. The next prime is 381828401. The reversal of 381828380 is 83828183.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9545690 + ... + 9545729.

It is an arithmetic number, because the mean of its divisors is an integer number (66819970).

Almost surely, 2^381828380 is an apocalyptic number.

It is an amenable number.

381828380 is an abundant number, since it is smaller than the sum of its proper divisors (420011260).

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

381828380 is a wasteful number, since it uses less digits than its factorization.

381828380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19091428 (or 19091426 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 381828380 is about 19540.4293709222. The cubic root of 381828380 is about 725.4754740725.

The spelling of 381828380 in words is "three hundred eighty-one million, eight hundred twenty-eight thousand, three hundred eighty".