381828816 has 60 divisors (see below), whose sum is σ = 1108179072. Its totient is φ = 127274976.

The previous prime is 381828803. The next prime is 381828817. The reversal of 381828816 is 618828183.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381828817) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45216 + ... + 52991.

Almost surely, 2^381828816 is an apocalyptic number.

381828816 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

381828816 is an abundant number, since it is smaller than the sum of its proper divisors (726350256).

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

381828816 is an equidigital number, since it uses as much as digits as its factorization.

381828816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98230 (or 98212 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 381828816 is about 19540.4405272757. The cubic root of 381828816 is about 725.4757502063.

The spelling of 381828816 in words is "three hundred eighty-one million, eight hundred twenty-eight thousand, eight hundred sixteen".